I've acquired a complete 86 z28 tpi unit off of a 305. What I'm considering is putting it on a 327 in a 63 impala. Does the original computer have enough adjustment for the additional cubes? What might I have to change?(injectors,chip, etc)

 

teh 86 tpi is a maf system and doesn't need to know engine size. and as long as your 327 is fairly tame, you will be ok as far as injector size. right off the top of my head i don't really know why it wouldn't work. however tpi has a long runner design to develop alot of torque. a 327 is a larger bore short stroke engine. it likes to rev higher, adn tpi quits breathing at about 4800rpm. something to think about

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86 IROC-Z
305 TPI
700R4 W/ shift kit
3.23 gears
T-Tops
maroon with gold stickers and rims/ black interior
43,000 miles
flowmaster exhaust, edelbrock headers, gutted airbox, converter, and MAF, K&N filters.

soon to come are 3.73 gears and subframe connecters.

 

The impala is a heavy car and it has an automatic. I know the 327 luvs to rev. But just dont think it'll see it in this car. If the tpi helps the bottom end that could be a big plus. Want to make this thing a great driver with some class.

 

You're gonna need a 85 TPI manifold base if you use factory 327 heads, or use 86 and up SBC heads. The intake bolt angle is different after 85 for all SBCs.

You'll definitely have more torque for the 327, but you might be disappointed with the above 4500 RPM TPI performance, where the 327 is known for making its power. If you are happy with the torque and would rather not go over 4500, the TPI would be perfect for you.

Jason

 

Jason is right about the bolt angles but unfortunetlly he is wrong on the years. The 86 TPI are Speed Density unit first off and second the TPI units are diffrent from 87' on up just like the heads. I found this out on my own when I tried to mix the two.

 

85-89 was MAF, not speed density. You're thinking of Mustangs if you believe that in 86' they had SD. My 86' was MAF before the DFI swap.

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1986 IROC, fully loaded, Mini Ram'd 383, Art Carr 700R4, Accel DFI, 12 bolt rear, etc, etc......

 

Yeah, the 85-89 are MAF sensed, while the 90-92 are speed density.

Jason

 

if you could get the stock TPI system to breath better(porting)i think it could be a good setup

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1991 banditt2 #130 of 600
Project 350 TPI Banditt II
http://www.street-dawg-racing.cityslide.com
www.gcfba.com (Greater Cincinnati F-Body Association)
http://www.cincyspeed.com/

 

Unless you can shorten the runners to about six inches of effective length instead of the origine 19", the old 327 isn't going to get along with the TPI setup very well. The engine is way oversquare, and isn't a real torque maker until the RPMs rise. The TPI is widely lamented for not working well at RPMs, so it would be like eating at Taco Bell - it might not be the best combo, but it will make you run.

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Later,
Vader
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Justice and Freedom will Prevail

 

I guess you could use the tpi setup, but a 327 would run much better with a good carb setup. If you really want fuel injection then go miniram. The 327 would like that setup much better than a stock tpi setup.
peace

 

yah if u wanna go fuel injected i would spend the money and get one of the aftermarket units like holley projection, or others(some are TBI and some are multiport). these systems are simmilar to a carb setup and would rev pretty good yet still deliver the fuel economy and drivability of fuel injection. i would also suggest lower gears if you want to take advantage of the rev happy 327. something about 3.42 or lower(numerically higher) just my opinion, there are guys here that know better than i do.

------------------
86 IROC-Z
305 TPI
700R4 W/ shift kit
3.23 gears
T-Tops
maroon with gold stickers and rims/ black interior
43,000 miles
flowmaster exhaust, edelbrock headers, gutted airbox, converter, and MAF, K&N filters.

soon to come are 3.73 gears and subframe connecters.

[This message has been edited by FlameRedMetallic (edited September 24, 2001).]

 

Well thanx everyone, you lost me a sale! lol Its dads 63 and my injection setup. Asked him how hard he planned to run the old impala and told him the rpm limit. Said no way. Guess I'll have to find a different project for the tpi. Maybe my 87 formula lg4 if i decide to keep it.

Anyway thanks for the info.

 

for high reving this is way better than TPI.
http://members.tripod.com/GRK_Taz/efi.html

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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....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
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 September 26, 2001).]

 

Just want to make sure everyone is clear about the intakes and maf sensors.

85 and 86 use the old chevy setup, 87+ uses the different bolt angles.

MAF was used on 85, changed the computer and MAF sensor in 86, and continued this until 90 where is Speed Density.

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Rob
'86 TA 305 TPI
Gutted MAF, Ported Plenum
TB Bypass, Home made Cold Air Intake,
Edelbrock T.E.S.
48psi regulator, (Nickel method)