intake and cam combo for a 305 tbi
09-28-2002, 10:51 PM
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Car: 1992 camaro rs 97 yoyota camry
Engine: lo3 carbed
Transmission: t 5
intake and cam combo for a 305 tbi
i have the most current summit book and i am interested in a couple of things in there... namely intake man and cam...
now the intake i like and can afford is the torker 2 which recommend using 232/ 234 .488" .488" cams now the cam i want to use don't come in those exact number but what would be a good cam to use???i want to have an ok idle doesn't have to be perfect but i want the power to go up to around 5000 or more rpm without loosing too much down low. the cams i want to buy come in sizes from 184/194.../.368"/.398" with a 109 lobe sep----
to a 254/264 .533"/.555" with 114 Ls
also i am keeping the stock heads for now until i can afford to get them ported an polished. also what would be a good rocker set with this set up?
right now the only mods i have is an xtreme lid pulled out the silencer ring, 3x14 filter open element not kn but cheap brand. also i have washers on the throttle body fuel pod to raise it up. and thatz all folks... any suggestions will be muchos apreciated!!!!!
oh my car is also a 5 spd if that helps.
please help me obiwan kenobi your my only hope!!
doesn't anyone know???
now the intake i like and can afford is the torker 2 which recommend using 232/ 234 .488" .488" cams now the cam i want to use don't come in those exact number but what would be a good cam to use???i want to have an ok idle doesn't have to be perfect but i want the power to go up to around 5000 or more rpm without loosing too much down low. the cams i want to buy come in sizes from 184/194.../.368"/.398" with a 109 lobe sep----
to a 254/264 .533"/.555" with 114 Ls
also i am keeping the stock heads for now until i can afford to get them ported an polished. also what would be a good rocker set with this set up?
right now the only mods i have is an xtreme lid pulled out the silencer ring, 3x14 filter open element not kn but cheap brand. also i have washers on the throttle body fuel pod to raise it up. and thatz all folks... any suggestions will be muchos apreciated!!!!!
oh my car is also a 5 spd if that helps.
please help me obiwan kenobi your my only hope!!
doesn't anyone know???
Last edited by 92rsv8; 09-29-2002 at 06:07 PM.
09-30-2002, 08:41 AM
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Car: 91 Camaro RS Convertible
Engine: 385ci LT1 cnc ported heads big cam
Transmission: 4L60E automatic
Axle/Gears: 3.42 Zexel posi 7.5" rear
On the cam, try to stay in the .450" to .470" lift on stock heads and make sure its a roller cam and not flat tappet. Any more than that and you will have valve train issues. A cam in 200-215 duration at .050" will be a nice cam for a 305 TBI with a lobe separation of 114 degrees.
I would not recommend porting and polishing the heads unless you can do the work yourself. The flow number after porting and polishing would not justify the cost of paying someone to do it. It is cheaper bang for the $$ to buy better heads because of the poor swirl port design.
I would not recommend porting and polishing the heads unless you can do the work yourself. The flow number after porting and polishing would not justify the cost of paying someone to do it. It is cheaper bang for the $$ to buy better heads because of the poor swirl port design.
09-30-2002, 09:59 AM
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Car: 1999 Yamaha Banshee
Engine: 379cc twin cyl 2-stroke stroker
Transmission: 6 spd manual
Axle/Gears: 14/41 tooth
Re: intake and cam combo for a 305 tbi
Originally posted by 92rsv8
please help me obiwan kenobi your my only hope!!
doesn't anyone know???
please help me obiwan kenobi your my only hope!!
doesn't anyone know???
)sounds like you need to stick with a LT1 cam. dont port the stock heads, use them as a door stop or something.
09-30-2002, 10:32 AM
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Car: 91 RS
Engine: 350 TBI
Transmission: 700R4
Refer to my other thread for a good price on some "seemingly" good heads.
https://www.thirdgen.org/techbb2/sho...hreadid=134316
https://www.thirdgen.org/techbb2/sho...hreadid=134316
09-30-2002, 03:53 PM
#5
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I agree with broady. If you want power to about 5000 rpm use a LT1 cam (.447/.459 205/207) and a nice dual plane manifold. Aucutally the Edelbrock TBI manifold would probably work great for what you're looking for, and thats nearly a direct bolt on.
09-30-2002, 11:20 PM
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Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
The LT1 cam (with the right springs) is good to about 6100-6300 RPM.
I used to have a '94 Z28 and stock it ran to 5700RPM before the rev-limiter. Then Hypertech came out with that PowerProgrammer (I never got one) and a lot of guys changed that to ~6200 RPM with no problems.
Granted the stock TBI heads, as well as a stock TBI are gonna choke the engine way before that, but I just wanted to post an FYI for future use. The LT1 cam is actually a pretty good swap.
AJ
I used to have a '94 Z28 and stock it ran to 5700RPM before the rev-limiter. Then Hypertech came out with that PowerProgrammer (I never got one) and a lot of guys changed that to ~6200 RPM with no problems.
Granted the stock TBI heads, as well as a stock TBI are gonna choke the engine way before that, but I just wanted to post an FYI for future use. The LT1 cam is actually a pretty good swap.
AJ
09-30-2002, 11:30 PM
#7
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Not doubtin ya AJ, my car pulls pretty hard to 6k 
Although I think my peak power is about... 5500-5600.
Although I think my peak power is about... 5500-5600. Trending Topics
10-03-2002, 08:59 AM
#8
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Whats the specs of the stock cam again? I just got a lt1 cam on ebay from a 97 TA with 17k for 31$. Over christmas break im gonna have to change the oil pump and im gonna put the cam in. I hope it goes smooth. I have the edelbrock intake so ill keep you posted on how it goes.
10-03-2002, 12:00 PM
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Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Originally posted by TBI305Camaro
Whats the specs of the stock cam again? I just got a lt1 cam on ebay from a 97 TA with 17k for 31$. Over christmas break im gonna have to change the oil pump and im gonna put the cam in. I hope it goes smooth. I have the edelbrock intake so ill keep you posted on how it goes.
Whats the specs of the stock cam again? I just got a lt1 cam on ebay from a 97 TA with 17k for 31$. Over christmas break im gonna have to change the oil pump and im gonna put the cam in. I hope it goes smooth. I have the edelbrock intake so ill keep you posted on how it goes.
Originally posted by Cuck!I agree with broady. If you want power to about 5000 rpm use a LT1 cam (.447/.459 205/207) and a nice dual plane manifold. Aucutally the Edelbrock TBI manifold would probably work great for what you're looking for, and thats nearly a direct bolt on.
AJ
10-03-2002, 01:43 PM
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Car: 96 SS, 88 IROC
Engine: Lt1, TPI
Transmission: m6,a4
Axle/Gears: 3.90. 3.73
I just got an LT1 cam out of my buddys 96 camaro with 17k on it.. He totaled it and had almost everything sold but the cam so I stole it from him, lol... Anyway. Am I going to have to do an ECU turning???? I head something about vaccum problems with this cam???? I just wanted to do a basic swap swap it in and go sorta thing.... If im going to have to do turning and other stuff I will just buy the 260h cam. Thanx for the help guys
10-03-2002, 06:31 PM
#11
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With the lt1 cam you just need a vaccum adjusted fuel pressure reg. althought chip tuning will help even more...
Look up or down for them huh? by stock cam i mean the lo3 cam.
Look up or down for them huh? by stock cam i mean the lo3 cam.
10-03-2002, 08:26 PM
#13
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Man the lo3 cam is a freakin BEAST! Man that is small...the lt1 cam is pretty small to. But I guess its a beast compared to the lo3 cam. The lt1 cam also has a good self EGR right? Id like to get rid of the EGR its a pain and I think my valve is going bad again. I have the cam coming now and Ill be installing it over thanksgiving break i hope.
10-03-2002, 10:44 PM
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Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Originally posted by AJ_92RS
Look up or down and you'll see them.
They're all real close to those specs. IIRC, it's 116.5 or 117 intake centerline with about 115 LSA.
AJ
Look up or down and you'll see them.
They're all real close to those specs. IIRC, it's 116.5 or 117 intake centerline with about 115 LSA.
AJ
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Look I'm quoting myself.
I got my numbers bass ackwards. It's 116.5 LSA and 115 Intake Centerline. Not that it makes a WHOLE LOTTA difference.
AJ
10-04-2002, 08:00 AM
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Car: 91 Camaro RS Convertible
Engine: 385ci LT1 cnc ported heads big cam
Transmission: 4L60E automatic
Axle/Gears: 3.42 Zexel posi 7.5" rear
I believe that WINALDL should be made a requirement for modifying TBI cars. Not only is it helpful for chip burning but can help properly tune fuel pressure and timing and can provide useful trouble shooting information.
Also, everyone should remember that the power band for a cam in a 305 will be higher than the same cam in a 350 due to the difference in displacement. Just like a 383 needs more cam than a 350 to have the same power band.
So the specs on a LT1 cam may seem mild but in a 305 those aren't bad at all.
You think the L03 cam specs are bad. Just think of those same specs in a 350 truck like the 92 I used to have. It had a redline of only 4500 with those specs. It sucked. Cam went in trash and all was better.
Also, everyone should remember that the power band for a cam in a 305 will be higher than the same cam in a 350 due to the difference in displacement. Just like a 383 needs more cam than a 350 to have the same power band.
So the specs on a LT1 cam may seem mild but in a 305 those aren't bad at all.
You think the L03 cam specs are bad. Just think of those same specs in a 350 truck like the 92 I used to have. It had a redline of only 4500 with those specs. It sucked. Cam went in trash and all was better.
10-04-2002, 08:46 AM
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Car: 1992 camaro rs 97 yoyota camry
Engine: lo3 carbed
Transmission: t 5
well lets say i get the lt1 cams or aftermarket ones with similar numbers... and i also do the adjustable fpr mod do i still need to change the fpr or use the stock one once its adjustable???
10-04-2002, 10:01 AM
#17
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Id like to run a ZZ4 cam in my car but I havent gotten into chip burning yet. But if i go carb like i might then ill go bigger than a lt1 cam...at least a zz4 cam or the comp cam h262 or whatever.
10-04-2002, 11:00 AM
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Car: 91 Camaro RS Convertible
Engine: 385ci LT1 cnc ported heads big cam
Transmission: 4L60E automatic
Axle/Gears: 3.42 Zexel posi 7.5" rear
You can just make yours adjustable but once you get the pressure up enough to cover the wide open throttle the normal crusing area will be to rich because of the increased pressure. That is why I posted to use the Vacuum adjustable fuel pressure regulator. It will keep the pressure lower at idle due to vacuum and increase the pressure at WOT. A search on this site for VAFPR will help shed some light.
Just make sure the cam you use does not exceed the .480" lift maximum on STOCK L03 heads. There is also a point where the amount of lift will cause the intake valve to smack the cylinder wall but I don't remember what that number is. It's over .5" somewhere.
The LT1 cam is so popular because the lift and duration works well with the limitations of stock heads and is CHEAP in comparison to new roller cams. You won't gain that much more with an aftermarket cam on stock heads.
Your best bet is to buy the LT1 cam for <$50 and put the rest of that money towards some better heads. You will gain a LOT more hp that way.
You can go carb but you better be very good at tuning to get anywhere near the same gas mileage as before and TBI can get nearly stock mpg numbers on a properly tuned chip.
Just make sure the cam you use does not exceed the .480" lift maximum on STOCK L03 heads. There is also a point where the amount of lift will cause the intake valve to smack the cylinder wall but I don't remember what that number is. It's over .5" somewhere.
The LT1 cam is so popular because the lift and duration works well with the limitations of stock heads and is CHEAP in comparison to new roller cams. You won't gain that much more with an aftermarket cam on stock heads.
Your best bet is to buy the LT1 cam for <$50 and put the rest of that money towards some better heads. You will gain a LOT more hp that way.
You can go carb but you better be very good at tuning to get anywhere near the same gas mileage as before and TBI can get nearly stock mpg numbers on a properly tuned chip.
10-04-2002, 07:35 PM
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Car: 1992 camaro rs 97 yoyota camry
Engine: lo3 carbed
Transmission: t 5
i just looked through summit and jegs and they don't have anything like the lt1 cam they have some with the same lower numbers but the higher numbers arent as high and vice versa but nothing even close. also where is a good place to get an lt1 cam and do i need anything else besides the vapr to use it?
10-04-2002, 11:59 PM
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Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
The best place is eBay. Got mine for ~$60 w/shipping. Although it's sitting collecting dust right now. 
Go to www.ebaymotors.com and do a search under "Parts:Car & Truck > Engines & Components" for either LT1 or LT1 cam.
Actually, I did the grunt work for you. ---->Click here<----
AJ
Go to www.ebaymotors.com and do a search under "Parts:Car & Truck > Engines & Components" for either LT1 or LT1 cam.
Actually, I did the grunt work for you. ---->Click here<----
AJ
10-05-2002, 01:29 AM
#21
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I got a 97 TA lt1 cam for 31$...if i decide to go carb Ill sell it to you for what I have in it. Im still not sure what Im gonna do. Im not that worried about MPG...if i was i wouldnt have bought a camaro in the first place. Im just worried about the car starting in terribly cold weather... 0 degree weather seems to be heaven for the TBI but im not sure how a carb would react to real cold temps. Damnit i wish i could just get another car...maybe a 4 banger eclipse or something to drive in the cold.
10-05-2002, 03:21 PM
#22
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Check the forsale section of www.camaroz28.com , too. I just happened to stumble across mine, but I only have $35 in it
10-05-2002, 03:58 PM
#23
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the lt1 cam may be the last mod i do to my 305. Im going to go ahead and get vortec heads, a bigger cam, intake, carb and all that good stuff and wait till tax time so i can get a l98 block then put that together. I thought about modding the 305 but I dont think it would be worth it. A brand new l98 shortblock with vortec heads and a cam should be tho 
10-05-2002, 04:57 PM
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doesn't gm offer a 350 short block that is cheaper than the "L98" block? any replacement 350 car block woudl have all teh provisions for th eroller cam and be the same 2-bolt bottom end. so if they have a cheaper one that woudl be the better option since it is the same thing.
later
tim
later
tim
10-05-2002, 05:17 PM
#25
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GM has a $1200 L98 short block and also the GM Goodwrench 350 thats musta just went up in price, which is now $1500...
The L98 short block is on sale at sdpc for $1135
The L98 short block is on sale at sdpc for $1135
10-05-2002, 07:01 PM
#26
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yeah you can get GM motors for pretty cheap but they all come with horrible heads and cams. Plus the compression on alot of the GM motors are real low. The l98 would have better compression and nothing i dont want on it. Only reason i think a goodwrech longblock would be worth it is for the oil pump, pan, and roller lifters that they come with.
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