1991sleeper

iTrader: (-3)

Hey there ppl .. I'm finally about to have enough $ to build the engine I want so here is the thread .. I should start ordering parts in about a month .. The goal is a 325-375 HP small block 327... I'm wanting it to be capable of 6000 rpm minimum .. I know anything over 6k is not easy with TBI ... I already have EBL Flash a TPI fuel pump and CFM TECH's 620CFM TB .. If 6k ain't doable with what I got 5500 will have to do I guess .. I am dead set on a 327 so I'm not looking for anyone trying to change my mind on that .. But if anyone has any comments or suggestions they would be greatly apretiated !! Here's a list of a few parts I have in mind..

CNC Motorsports 327 w/3.250 crank 6.25 rods 9.5-10:1 compression ratio ( eagle (lightweight crank) & rods gapless top ring (all ARP bolts)
AFR 175cc heads (assembled)
Hydraulic roller cam & full roller rockers ¡¡ Suggestions please !! I like crower
Single plane carb intake ( suggestions ?)
High volume water pump ( brand suggestion?)
New aluminum radiator ( brand ? Decent price ? )
Chromoly pushrods (crower)
Good timing chain set ( suggestions ?)
Any other suggestions would be greatly apretiated .. I'm trying
To get as much info as possible to do this right ! Thanks !

Ok now to tell y'all what I already have ..

•620CFM TB, EBL Flash ,TPI Pump, TT-2 WB
•Shorty headers 2.5"-3" y-pipe and full 3" exhaust W/3" cutout in front of rearend Into flowmaster muffler
•auburn 4:10 gears & Posi w/disc brake rear
•ws6 swaybars front & back w/ poly bushings & links
•UMI torque arm & LCA's w/ poly bushings
•torque arm relocation bracket
• drilled & slotted front rotors
•ram air 2 hood
Oh yea I also need an external FPR (suggestions please )

Let me know what y'all think !

1991sleeper

iTrader: (-3)

Oh yeah another thing I was wondering .. Is there an msd billet distributor or equivalent that is TBI compatible ?

irishhockey34

iTrader: (12)

Most of those parts will be up to your preference. Most critical would be the cam selection to match those heads, bottom end, and manifold. Like you said getting over 6k RPMs out of a TBI is almost unheard of, but your setup should make the power you want under that. Sounds like you have the right idea though.

For what its worth, I have a vortec 350 TBI, 10:1 flat tops, mild comp cam, GMPP TBI intake, stock TBI bored and am making around 330 HP running 13.6's all day in the 1/4

1991sleeper

iTrader: (-3)

Thanks man .. Like I said 6000 rpm shift point would make me extremely happy but 5500 would work for me .. What cam would u suggest .. And I'm actually thinking about downgrading on my head choice for a similar cheaper set .. I'm guessing the 175-180cc intake runners will be a good choice for a TBI 327 ? And anyone have any cam advice for this setup ? I'm wanting to keep it hydraulic roller . Thanks for any info !

I'd like to run 13.0000s .. W/ T5 & 4.10's

1991sleeper

iTrader: (-3)

Are ur heads stock ? I was thinking about the summit brand vortec heads as well

irishhockey34

iTrader: (12)

I'm running out if the box GMPP vortec heads. They can be modified and you can even buy them modified from scoggin dickey (sp?) to accept a larger cam. You get a lot of bang for your buck with vortecs

morgsie

iTrader: (1)

Don't mean to hijack, but what cam are you running? Have you had your car dyno'd or is the 330RWHP an educated guess? Have a similar setup.

1991sleeper

iTrader: (-3)

I'm thinking about using these heads http://m.summitracing.com/parts/sum-162108
And if my cam i choose is too close to max lift I'm a
Use the titanium offset retainers .. Hopefully the springs are good enough for a hydraulic roller cam

irishhockey34

iTrader: (12)

I'll have to dig up the cam card to know for sure. I'll post it when I find it. And the HP is a guess based off of 1/4 mile times

InfernalVortex

iTrader: (4)

Do you have a weight and a trap speed? 1/4 mile times are terrible hp indicators, but weight and trap speed are very accurate.

Ronny

iTrader: (1)

I dont believe MSD offers a TBI application. I would call them to determine if an MSD can be converted to communicate with EBL. Most will say a stock GM is as good as you can get. With quality Delco internals.

1991sleeper

iTrader: (-3)

Cool thanks Ronny ! What Sony think of the parts I have listed so far ? And could any of u recommend a cam ? Hrdraulic roller preferably .. I wanna shift around 55-5800 ..
I'd like to shift at 6k but I don't think the TBi is gonna wanna go that high :-/

morgsie

iTrader: (1)

I picked a GM Performance small cap HEI distributor for $200 off summit: http://www.summitracing.com/parts/nal-1104060

Ronny

iTrader: (1)

XR 276 HR comp cams 1800-5800 rpms 1987-1998 block 224/230 .05 112 LSA lift is .503/.510

you dont have a roller block do you? Then skip above.

instead 268 XFI HR13 retro fit roller uses 1.6 rockers

RBob

iTrader: (1)

No issues going above 6K RPM when using the EBL Flash ECM. First gear I usually shift at 6200 RPM, also a 331 (30-over 327).

RBob.

Ronny

iTrader: (1)

At 6,000 rpms you have 4.25 msec to fire one injector considering 85% max allowable for duty cycle. So you need a larger injector and high fuel pressure to deliver adequate fuel within that time constraint.

I too shift at 6000 rpms however I have 75 lbs injectors at 26 lbs fuel pressure. My DC is about 88% last I looked.

1991sleeper

iTrader: (-3)

Sweetness .. Could u recommend a cam and intake ? Also what do y'all think bout them summit heads ? What injectors should I use ? Also the short block ill e using is a straight up 327 ready to go with all forged internals and ready for HR cam .. I've looked into cams but dam* they r proud a them .. I've seen some lifter & cam kist for 400$- 700$ I'd like to stay on the cheaper side of that window lol ... Also thought about the summit reman vortex heads cause they are a little cheaper ..

RBob

iTrader: (1)

I don't build enough engines to recommend many of the pieces. The current intake manifold is an Edelbrock Performer RPM with the center divider cut down. Also have coolant running under the plenum via the exhaust crossover.

The '113 heads have the exhaust crossover blocked, so easy to run coolant instead.

RBob.

Fast355

iTrader: (2)

I was starting my WOT upshift at 6,400 rpm and completing it in the 6,700 rpm range on a 7,000 rpm pill in my MSD with the TBI PCM. The rev-limiter in the PCM was turned off due to the 6,400 rpm limitation. I was running in Asynch above 3,500 rpm at WOT.

1991sleeper

iTrader: (-3)

Ok thanks guys .. Why would u want coolant running under the intake ? I know not to use an air gap style with TBI .. But I live in alabama so we don't get very cold temps down here and I don't drive it much when it's cold anyways .. So most of my driving will be in 60-110* weather .. Would u still recommend a heated manifold ?

RBob

iTrader: (1)

It provides better drive-ability. Even on hot days a short WOT will chill the manifold by a great amount. It is helpful to have a consistent source of heat right under the plenum.

RBob.

1991sleeper

iTrader: (-3)

Ok thanks .. I guess I will try to use the coolant method , I don't line the idea of hot a** exhaust under my manifold ... So how exactly do u tap the coolant into the manifold ?

Ronny

iTrader: (1)

There is an exaust assageway dead center head to head that can be tapped into on top of manifold. you should see a bump there on each side. runs right under plenum.

http://www.holley.com/data/products/...arge300-49.jpg

RBob once posted a photo of his set up in a thread I started a couple years back.

RBob

iTrader: (1)

Pictures at post #17 in this thread:

https://www.thirdgen.org/forums/tbi/...gle-plane.html

The AFR heads usually have a drilled hole for exhaust crossover. Should be able to tap it NPT and use a brass pipe plug in them.

RBob.

thomas1976

Here is some imput about those heads. https://www.thirdgen.org/forums/tech...ads-clean.html

irishhockey34

iTrader: (12)

Comp Cam 12-388-4
330HP estimated at the flywheel
Car runs 13.6's at 100MPH

seanof30306

iTrader: (4)

300hp, max, would be my bet. Probably around 275. Stock TPI 3rd gens ran low 14s with 240 flywheel hp; it's easy to tune them into mid 13s with no internal mods.

seanof30306

iTrader: (4)

@ OP. Why a 327? You can get an awesome new (not rebuilt) L31 350 shortblock from GMPP for under 1,500 bucks, and it has a 1-piece rear main seal. Upgrade the rod bolts to ARPs if you feel it's necessary for under a hundred bucks and you have a great foundation for what you want to do. I understand you said you're dead-set on a 327, and I'm not trying to start an argument, but I'd like to understand the reasoning behind spending more money for less cubes.

Also, for a street car, I think 4.10s are a little extreme. With everyday driver street tires, if you make the power you hope to, all you're going to do is smoke the tires IMHO (and experience)

InfernalVortex

iTrader: (4)

Depending on the weight of your car 100 mph traps is in the 270-320 hp range. If your car is the average 3500 lb with driver thirdgen weight then it's 290fwhp. 13.6 is pretty good at that mph, you've got that car set up really well.

irishhockey34

iTrader: (12)

Thanks Vortex, it's an insanely fun street car!

pound

iTrader: (7)

One month late, but if you really want a billet distributor MSD makes one that fits our cars - http://www.summitracing.com/parts/msd-8366

Its plug and play and replaces the stock distributor. It is expensive, but when you get it and compare the workmanship to the cheap parts stores ones or even the OEM one you will see why it is so expensive.

1991sleeper

iTrader: (-3)

Well this build is on hold for awhile I'm about to just rebuild the stock LO3 for now cause its starting to smoke pretty bad n then ill just slowly gather my parts over the next year or two to build what I want .. TheLo3 build will be happening in the next couple months for around 1500 -2000 $ total while the 327 will be 5000+ so like I said it will be an LO3 for now w/ factory ported heads .. I already have a cam kit .485 .495 lift 266 270 dur. W/ lifters springs & retainers .. Ill also be having 1.94 ..Valves put in already have 1.6 rockers that have been on the motor used intake for 100$ .. All I need is machine work oil pump and a rebuild kit

seanof30306

iTrader: (4)

If the L03 is absolutely shot, and can't be limped along till you can build your dream 327 (a couple of quarts of oil per month is a lot cheaper than rebuilding the L03), I'd say spend 700 bucks on a remanufactured bone-stock L03 that will go right in with no mods, and put the difference towards Project Three-Twenty-Heaven (I get credit for the name, dude).

You can then sell the L03 to someone else on here who is in a similar situation to what you are in now and get some of your money back.

Porkys92RS

I dunno why all the gibberish, I have a bone stock ( with exceptions, edlebrock performer TBI intake, headers no cat magnaflow cat back) 1992 RS Camaro, I turn the factory 175,000 miles 305 to rev limiter, approx. 6200 rpms all the time....

Schurkey

Agreed. But since this thread has been dead for years, I suppose it's pointless to ask about it.
First Guess: Inaccurate tach.