Let's say I manage to lay my hands on a clean 305 RS... Would the computer in its stock form be able to support a mild 327?

I've alredy explored the idea of a TPI/327 combo, but with TPI falling short above 4500 RPM, and a 327 making it's best power between 5700 and 6200 RPM it's just not an effective combo.

Would TBI be effective on an engine that makes its peak power above 6 grand?

All this got going in my head after I went to Super Summit IX, at Summit Racing Equipment last Saturday, and I saw a 327 '70 Nova. It got me thinking of the '69 Impala I had back in the day, which had a 327/Powerglide 2spd auto combo. Of all the small blocks I've owned over the years that was my absolute favorite.

I was just thinking it would be something you don't see every day in a thirdgen Camaro, a TPI 327 that is.



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'86 Camaro SC 2.8 V6, 5spd, T-Tops
Mods:

(Performance)
Flowmaster cat back exhaust

(Non-Performance)
Pioneer DEH-P4000 head unit
Pioneer 6X9 Tri-Ax speakers
Jensen 8" dual voice coil sub
Blacked out tail lights and side markers (VHT
Nightshades spray tint)

3

 

It should have no problem. Lots of people here are running 350's with TBI and stock chips with no problems so I would imagine a mild 327 would be no sweat and would be a bit original as well.


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Evil's 88 Camaro
Stock 305 TBI Auto, Flowmaster, Full 3" Exhaust, B&M Megashifter, K&N Open Element, MAC Lower Control Arms and Panhard bar

 

yes. get a single plane intake, new chip to rev higher, adjust your tranny cable to rev higher and have fun

TPI would be a bad idea on a 327 unless you modified it heavily to rev higher like doing simeased runners or changing to a, mini-ram, super ram, or single plane multi port intake.
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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

[This message has been edited by Tas (edited June 15, 2001).]

 

I'm kind of in the same boat as badbowtie because this summer I want to switch to either a 283 or 327 that I have sitting in my garage. These are both engines with huge redline capabilities and I was wondering how the stock chip could handle these engines. Either one I build will be mild so I will be keeping my stock 5 speed behind the engine because it has stood the abuse of my crazy dumps and power shifts with the 305. I was just wondering what kind of input I could have to get the best out of the TBI unit for these paticular engines.

 

Now all I have to do is find a clean 305 RS

If not, it's going to a carbed 327 sitting where the 2.8 now resides in my Camaro SC.

 

You're right about TPI and 327 not working too well. It wouldn't be bad but TPI was "tuned" for long stroke to make torque. The 305 and 350 have the same stroke bt 327, 302, 283 all have short stroke so not so good. TBI 670cfm could flow enough for a 327 up to 380hp (need a better fuel pump) and you would have all the advantages of a carb up top and still have the EFI for all it's worth. You would have to do a LOT of eprom tuning because the 327 won't need as much fuel down low but will want more uptop and in less time (than a longer stroked engine). As for the 327 making more hp up top than a 350, that's been proven to be false. It just feels that way because the 327 doesn't have as much torque down low so the "power" seems to magically appear up high. A 350 will similar parts should make it's max power just about the same place as the 327. It's the awesome torque curve of the longer stroked engines that makes it's power seem really sluggish but smooth.
I would love to build up a 283, my friend has a 327 in his 69 maro and his father is building up their 283 (bored 6 over) into an old ******* Jeep. My friend likes the 327 but he's told me time and time again that he would be happier with a 350 (360 after he goes to 6 over) because it makes more power all over. I personally don't care what engine it is, just as long as it's done with taste. No "350 carb," because I'm just getting tired of the 350 and carb is SO old. What do you see when you go to a car show? Usually a 350 with carb(s), it's been done to death .
I love TBI, it's the "KISS" (keep it simple stupid) EFI system. I think it is the easiest intake system to understand, carbs are full of parts and everybody knows MPFI w/ MAF/MAP, all that jazz and 8 injectors running at HIGH fuel pressures blah blah isn't simple.


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, Jon (350 TBI!)
91 Red My website

 

I think TPI is simple, but then again I had been messing with it for about 6 years so I kind of know the parts like the back of my hands.

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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

tbi would be easier and better if you had a radical cam in it. i also think it would be the ideal choice between carb or tpi. looks like you know tpi is a hard shot. tbi will do it. and do it better than carb. not more power, more efficiently better.

 

Thanks for the replies. Now it's just a matter of locating a clean 305 RS, then coming up with the money to make up the differance between asking price and what I sell my 2.8 SC for LOL.

No matter how difficult the V6 to V8 swap is it's sounding better by the day LOL

But, then it would be a carbed 327 and not FI, seen as I would just gut the computer completely for that swap.

 

This is a topic I can relate to.

I had a 327 with TBI in my 92 RS. I bought the car used, and it came like that. It was just the standard TBI setup, but had 350 injectors, the 305 one's won't cut it. It still had the 305 chip, had a cam just a hair bigger then the LT-1 cam, more lift I mean, almost same duration, 112 degrees. It had a stock 305 TBI manifold too. But, it had TPI heads that had been worked, alot. It ran very good.
Did I mention it ran 13's?
Then engine blew a few months ago when I was playing with nitrious, and the aux. fuel pump for the nitrious (wet system) failed and blew a hole in a piston, which made that rod break loose from the pin, tore in half, and shot out the oil pan.

Coolness.

 

I've got your clean RS
Email me @ cstallard4@hotmail.com after 5pm est or @ clinton.stallard@langley.af.mil 7-4pm

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Flowmaster 80 series muffler
Gutted Cat
K&N Open Element cleaner
Ultimate TBI Mods
Subframe Connectors
GM Wonderbar
lead pedal foot . See my project rocket turtle @
http://oursportscars.homestead.com/home.html