Sonoma sbc turbo build
#1
Sonoma sbc turbo build
hey guys, names jesse.. been on s10forum and whatnot for a long long time.. decided to come on here since you guys are all gods of the small blocks and what needs to be done.. Anyways a overview of what i got, its a 2001 sonoma on full airsuspention, custom interior and bed, all that jazz. Last year i decided to pull the 2.2 out and build my first 350 and stick it in. Block is a 78 c10 2-bolt, installed a thumper cam and some vortech heads, performer intake and a 750 edelbrock carb. Put down 330hp and 375tq on the dyno last winter. Well this year its time for a big change. I bought a 78 4-bolt block for 50$ from a guy at work and gonna stick that in, but will also be adding a turbo to this one. Was thinking about doing a twin but would run into major clearance issues on the drivers side so i will be doing a single. I will be purchasing the turbo kit/headers/wastegate hopefully next friday and i will be going from there and peiceing everything else together. Also got a few other plans i will be doing over winter to.. but as for now the list goes and i kno much more will be needed:
- LSD rear end
- holly 750 carb converted blowthrew
- Single turbo
- Line-lock on breaks
- Electronic cut-out
and heres some of the truck:
http://i817.photobucket.com/albums/zz100/pearl01chevy/Sonoma/Interior/SL374906.jpg[/IMG]
And heres how she sits currently, taking a/c box out and putting heater only in:
radiator mounted inside support:
LSD picked up for 80bucks w/axels
Still thinking about going w/this to:
- LSD rear end
- holly 750 carb converted blowthrew
- Single turbo
- Line-lock on breaks
- Electronic cut-out
and heres some of the truck:
http://i817.photobucket.com/albums/zz100/pearl01chevy/Sonoma/Interior/SL374906.jpg[/IMG]
And heres how she sits currently, taking a/c box out and putting heater only in:
radiator mounted inside support:
LSD picked up for 80bucks w/axels
Still thinking about going w/this to:
#3
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Car: '86 Grand National
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Re: Sonoma sbc turbo build
did your other truck you sold ever get the turbo installed, and running?
#4
Re: Sonoma sbc turbo build
the turbo was installed and had all the exhaust piping done and then i sold it. So sadly no i never got to see it run. Always wondered how it woulda been though.. And having said that it makes me confident to complete this build!
#5
Re: Sonoma sbc turbo build
Hopefully this post gets some much needed attention in the threads!! hah
Starting out pretty much got the radiator/support done, still need to throw some filler on there and do a final paint but im happy with the turnout! its nice and flush so ill have more space in the engine compartment.
and FINALLY my turbo kit came!! Been a long week and half wait but im sooo happy its here! Turbo is alot bigger then i expected
The wastegate
And the headers/crossover pipe, i can only use the passenger header for clearance issues.. and btw i didnt even have this kit in my garage for a hour before i started cutting it up to fit haah
Starting out pretty much got the radiator/support done, still need to throw some filler on there and do a final paint but im happy with the turnout! its nice and flush so ill have more space in the engine compartment.
and FINALLY my turbo kit came!! Been a long week and half wait but im sooo happy its here! Turbo is alot bigger then i expected
The wastegate
And the headers/crossover pipe, i can only use the passenger header for clearance issues.. and btw i didnt even have this kit in my garage for a hour before i started cutting it up to fit haah
#6
Re: Sonoma sbc turbo build
And heres another clearance issue which is not alllowing the turbo to sit flush on the header plate
And the wastegate tube needs to be moved up i say 2inchs and ill be good with that
And heres the money shots!
And lastly i sent my 4bolt block yesturday to the machine shop!
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#10
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Car: '86 Grand National
Engine: LZ9????
Transmission: 2004R
Axle/Gears: 3.42
Re: Sonoma sbc turbo build
i figured it was a chinese turbo since i didnt see any markings. was just wondering the size, looks huge lol.
#11
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Car: '85 TA
Engine: 350 turbo
Transmission: T56
Axle/Gears: 3.70 posi 9bolt
Re: Sonoma sbc turbo build
What are you going to do about the turbo hitting the alternator? It looks like you'll have plenty of room on the upper driver side to relocate it there?
#13
Re: Sonoma sbc turbo build
originally i wanted to do a twin turbo setup. But with the headers thats sold for the twin kit the turbo would be setting where the mastercylinder is for the breaks. And i was seaching around and found a 1/4 and 1/2" spacer so i can space out the turbo if i need to, but im about to run down and move it and see if theres a difference. Also i kno ill need to wrap that turbo
but anyways.. i called the machine shop today and talked to them. They said the 4bolt block would need a bore so i said screw it and doing 30over. So now ill have a 355.. And the other question i got for now is this is the cam i got in the truck currently, would this be alright to run with my turbo? or should i look elseware
but anyways.. i called the machine shop today and talked to them. They said the 4bolt block would need a bore so i said screw it and doing 30over. So now ill have a 355.. And the other question i got for now is this is the cam i got in the truck currently, would this be alright to run with my turbo? or should i look elseware
#14
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Car: '86 Grand National
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Re: Sonoma sbc turbo build
the LSA seems too narrow for a turbo. the overlap is 20* which also seems a little too much.
#15
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Engine: 3xx ci tubo
Transmission: 4L60E & 4L80E
Re: Sonoma sbc turbo build
That looks like a supercharger/nitrous cam. I would look for something more turbo friendly.
Have you thought about using a smaller sized CS130 alternator that will put out as much amps as that 12SI alternator? I used the same header and had to make a low mount alternator setup to clear the 12SI and a Garrett T04E compressor with a smaller/lower .84 A/R turbine. The CS130 would have been a better choice.
That 69mm compressor wheel will work great on a 355ci.
Have you thought about using a smaller sized CS130 alternator that will put out as much amps as that 12SI alternator? I used the same header and had to make a low mount alternator setup to clear the 12SI and a Garrett T04E compressor with a smaller/lower .84 A/R turbine. The CS130 would have been a better choice.
That 69mm compressor wheel will work great on a 355ci.
#16
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Car: 92 Z28
Engine: Boosted LSX
Re: Sonoma sbc turbo build
Nice truck.. Should be a sweet ride when done.
Thats a BBSD knock off turbo setup. Was sold on ebay years ago also.
Thats a BBSD knock off turbo setup. Was sold on ebay years ago also.
Last edited by FSTFBDY; 11-17-2011 at 07:31 PM.
#17
Re: Sonoma sbc turbo build
ah thanks so much guys for the post..
I need a more powerful alternator as it is considering all the air compressors i run for the air suspention. That little stock alt is cutting it thats for sure.
And yea i got it off ebay.. i figured it was a good price for what i got, i knew i had to do modds to everything since there is no such thing for a kit to mount a turbo in a s10 with a sbc..
and 34blazer.. i honestly dont understand cams to much, can ya go more into details if its not to big of a deal thanks!
Another quick question. my buddy has this carb: http://www.summitracing.com/parts/HLY-65-3310/
he will sell it to me for 30 bucks, it will need a rebuild kit even though it was running on the truck when he got it "i seen it run". Will this be ok for boost? i know i have to do that whole conversion thing to so its a blow threw, but is this a good canadit? i currently have a edelbrock 1407 carb: http://www.summitracing.com/parts/EDL-1407/
I need a more powerful alternator as it is considering all the air compressors i run for the air suspention. That little stock alt is cutting it thats for sure.
And yea i got it off ebay.. i figured it was a good price for what i got, i knew i had to do modds to everything since there is no such thing for a kit to mount a turbo in a s10 with a sbc..
and 34blazer.. i honestly dont understand cams to much, can ya go more into details if its not to big of a deal thanks!
Another quick question. my buddy has this carb: http://www.summitracing.com/parts/HLY-65-3310/
he will sell it to me for 30 bucks, it will need a rebuild kit even though it was running on the truck when he got it "i seen it run". Will this be ok for boost? i know i have to do that whole conversion thing to so its a blow threw, but is this a good canadit? i currently have a edelbrock 1407 carb: http://www.summitracing.com/parts/EDL-1407/
Last edited by pearl01chevy; 11-17-2011 at 09:22 PM.
#18
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Re: Sonoma sbc turbo build
Originally Posted by pearl01chevy
i honestly dont understand cams to much, can ya go more into details if its not to big of a deal thanks!
#19
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Re: Sonoma sbc turbo build
Vast majority of turbo cams out there do not look like that I still think there will be some reversion regardless if theres a turbo or not on the exhaust. Thats a big duration overlap event on a smaller motor. All cammed cars with decent overlap have reversion at idle and sometimes low engine speeds.
The better the design is for the turbo system, from headers to turbine sizing, generally see less and less back pressure. The closer you are to 1 to 1 ratio of intake boost/exhaust backpressure, or even to the point of LESS exhaust backpressure vs intake boost pressure, the more closely the Cam can match a n/a type motor spec. I wouldnt use that cam, but it may "work" it just wont work as well as it could.
I doubt that header design will show less back pressure vs boost pressure so the overlap on the cam should be cut down.
The better the design is for the turbo system, from headers to turbine sizing, generally see less and less back pressure. The closer you are to 1 to 1 ratio of intake boost/exhaust backpressure, or even to the point of LESS exhaust backpressure vs intake boost pressure, the more closely the Cam can match a n/a type motor spec. I wouldnt use that cam, but it may "work" it just wont work as well as it could.
I doubt that header design will show less back pressure vs boost pressure so the overlap on the cam should be cut down.
#20
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Re: Sonoma sbc turbo build
The beauty w/reversion in his turbo application is that he will get the added benefit of even more higher RPM perfomance to be used w/that GT45 turbo. Common flat spot's w/reversion in naturally aspirated applications will not apply here, and the charge is literally instantaneous, even at idle speeds. The turbine cannot differentiate between a burned mixture, or an unburned mixture, it only knows to move when being pressurized to do so, so in the end all pressure is being forced through the exhaust valve, regardless. I for one even noticed a decrease in EGT when switching from a 116-LSA down to a 110-LSA, more than likely due to the slight amount of unburned and colder air entering into the turbine exhaust housing...
#21
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Re: Sonoma sbc turbo build
EGT would drop due to unburned mixture. Did that not affect turbine performance? Heat is a key element in getting spool but so is exhaust pressure pulse energy which is related to the heat.
I've only seen one other setup that used a tight 108 lsa cam and it runs hard. Blown385 I think his name was on TTF.com. Has the turbo sonoma or s10? Low 9 second almost high 8 second ride then? It was a tighter duration split cam, but tight LSA.
I've only seen one other setup that used a tight 108 lsa cam and it runs hard. Blown385 I think his name was on TTF.com. Has the turbo sonoma or s10? Low 9 second almost high 8 second ride then? It was a tighter duration split cam, but tight LSA.
#22
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Re: Sonoma sbc turbo build
Originally Posted by Orr89RocZ
EGT would drop due to unburned mixture. Did that not affect turbine performance? Heat is a key element in getting spool but so is exhaust pressure pulse energy which is related to the heat...
#23
Re: Sonoma sbc turbo build
well for ***** and giggles decided to threw my old hood on and check to see how much i'd have to cut the hood up for the turbo, i sput the one side of the turbo so it wasnt pointing up anymore and it helped out but.. boy was i suprised.. i got a crapload of room between the hood and the turbo so im extremely happy with that. I even added a temporary 1/4" spacer between the turbo and the header to get it up off the valve cover and alternator.
#24
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Car: 91 camaro rs
Engine: 355, blowthru, 78mm turbo
Transmission: th350, art carr converter
Axle/Gears: stock 7.5, 3.23s, minispool
Re: Sonoma sbc turbo build
not gonna get the forum too off topic, but heres a pic of mine, lq4 6.0 liter, 4l80e, 12 bolt, tc78 turbo.
second pass 10.82 at 128.5, 10 psi.
also on a log manifold,
second pass 10.82 at 128.5, 10 psi.
also on a log manifold,
#27
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Car: 91 camaro rs
Engine: 355, blowthru, 78mm turbo
Transmission: th350, art carr converter
Axle/Gears: stock 7.5, 3.23s, minispool
Re: Sonoma sbc turbo build
mines a major pain to pull.. cant pull motor / trans seperate, have to pull em together ( 4l80e is so huge in the trans tunnel..) which means i have to take off radiator, core support etc.. and come straight out the front with it...
#28
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Car: 91 camaro rs
Engine: 355, blowthru, 78mm turbo
Transmission: th350, art carr converter
Axle/Gears: stock 7.5, 3.23s, minispool
Re: Sonoma sbc turbo build
im gonna push it in the spring with race gas and cal tracs and more boost ( maybe bigger turbo..) and see what i can squeeze outta this junk yard motor
#30
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Car: 91 camaro rs
Engine: 355, blowthru, 78mm turbo
Transmission: th350, art carr converter
Axle/Gears: stock 7.5, 3.23s, minispool
Re: Sonoma sbc turbo build
Do you have a stall in the truck now?
^ not sure if this was to me or the OP, i have a 3500 and it drives like totally stock, i will be loosening it to around 4000 for next year..
^ not sure if this was to me or the OP, i have a 3500 and it drives like totally stock, i will be loosening it to around 4000 for next year..
#34
Re: Sonoma sbc turbo build
Motor is stripped down and ready to sell
Just curious why would the cam look like this on spots?
Also im a bit weary of this timing gear after seeing this..
Also instead of drilling and tapping a hole in the oil pan for a return like, couldnt i just drill and tap into this plate??
and the wheel wells are out, bout to start the long process of getting that frame cleaned up
Just curious why would the cam look like this on spots?
Also im a bit weary of this timing gear after seeing this..
Also instead of drilling and tapping a hole in the oil pan for a return like, couldnt i just drill and tap into this plate??
and the wheel wells are out, bout to start the long process of getting that frame cleaned up
#35
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Car: '85 TA
Engine: 350 turbo
Transmission: T56
Axle/Gears: 3.70 posi 9bolt
Re: Sonoma sbc turbo build
For your oil return question, you can add a fitting in the fuel pump block off plate and drain the oil there. Here's mine:
#36
Re: Sonoma sbc turbo build
Finally finally got my block back, some info on it: bored .30 over, magnafluxed, cleaned, hoaned, new cam bearings installed and new freeze plugs installed.. man oh man not a nice bill but in the end it was so worth it. she sooo pretty!!
And this is gonna get outta control quick since im so picky.. frames getting por-15
And this is gonna get outta control quick since im so picky.. frames getting por-15
#37
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Car: 1992 camaro RS
Engine: 5.3 lsx
Transmission: 4l60, soon to be t-56
Axle/Gears: 3.23
Re: Sonoma sbc turbo build
Man your going to need to put a turbo on the other side also to balance the truck out haha. Sweet build.
#38
Re: Sonoma sbc turbo build
alright back to motor questions.. getting ready to buy the pistons/rods.. what would be best for my setup?? I was looking at these for pistons :http://www.summitracing.com/parts/UEM-KB171-020/
and what about rods?? my stock rods wont hold up correct?? looking for some opionions on parts that wont kill my wallet.
and what about rods?? my stock rods wont hold up correct?? looking for some opionions on parts that wont kill my wallet.
#39
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Re: Sonoma sbc turbo build
I'd rather see forged pistons and h-beam rods with good bolts for a turbo car but do what you can with your budget. Pistons can live if the tune is right. Spend money on the rods/rod bolts to be most safe.
Not sure what heads you were going to use or if you are keeping this a 355 or going 383 but flat tops with a 355 and 64cc head is low 10's to 1 compression. With a 383 thats 11 to 1. Too high for boost. I like 9-9.5 to 1 with aluminum heads. Would need a small dish piston.
Not sure what heads you were going to use or if you are keeping this a 355 or going 383 but flat tops with a 355 and 64cc head is low 10's to 1 compression. With a 383 thats 11 to 1. Too high for boost. I like 9-9.5 to 1 with aluminum heads. Would need a small dish piston.
#40
Re: Sonoma sbc turbo build
for now i plan on keeping the vortech heads, going to put roller rockers on them also and possibly change the springs.. and yes i do plan on keeping it a 355. and thanks for that tip.. back to searching!
#42
Re: Sonoma sbc turbo build
Avoid the Kieth Blacks. The ring lands are a lot higher up on them than a traditional piston. This makes it a weaker land, as well as making it more likely the rings will but. If you do use them I would strongly advise looking at their web site as I do believe they have a modified gap chart. I suspect that's a reason why people have issues with them.
Personally I would use something like this:
http://www.summitracing.com/parts/STL-H580P30/
Yeah they are heavier but at the same time there are a few people using these with good results in the Turbo Buick community.
Personally I would use something like this:
http://www.summitracing.com/parts/STL-H580P30/
Yeah they are heavier but at the same time there are a few people using these with good results in the Turbo Buick community.
#44
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Car: currently 91 camaro
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Transmission: soon to be 4l80e
Axle/Gears: 99 ss rear end with richmond 4:11's
Re: Sonoma sbc turbo build
umm me to.. anxious to hear the answer to this one. i was going to spend $500 on pistons for my build but if i can use these then pshh life is good lol
Last edited by 89fbrestor; 12-14-2011 at 12:58 PM.
#46
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Car: currently 91 camaro
Engine: soon to be 350 turbo
Transmission: soon to be 4l80e
Axle/Gears: 99 ss rear end with richmond 4:11's
Re: Sonoma sbc turbo build
i plan on pushing mine so I'll go forged bummer got excited for nothing
#47
Re: Sonoma sbc turbo build
hahaha same here.. but how hard are you ACTUALLY pushing yours?? mines only a weekend driver and maybe the strip here and there.. just something to play around with, nothing serious.. would this pass for the pistons posted above?? also any suggestions on rods??
#49
Re: Sonoma sbc turbo build
No not saying that they are the absolute best but I would use em way before the kbs. My buddy went mid 11s wit a buick v6 on the trw hypers though. 27lbs boost and he did about 75 of spray too. Keeps eating cams but the pistons are fine. Ton of street miles and track time. Open the gaps up too, that is probably a big part of it as well.
#50
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: Sonoma sbc turbo build
dont use that cam, it apears to be a comp cams "thumper" cam, they use lots of overlap to get that rough race car type idle sound.stick with something in the 224/224/ 232/232 duration range