I finished the mod of all mods. I successfully swapped a TPI for a LT1 intake and it is fully road tested today. It's back in service as my daily driver.
Don't ask, I'm already ahead of you, the tech article is in works, I took lots of pictures.
I will have track times Monday, before and after. Sunday is test day at Silver Dollar Racetrack, GA(Big Fall Shootout-Fbodys only).
Here's the latest pic all done.



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86 Camaro Sport
383 Speed-O-Motive Crate Engine, Raptor 700R4 Tranmission, Trick Flow Twisted Wedge G2's, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Hooker Cat-back, Serpentine Belt Setup, Dual IROC Fans, Jamex springs, 16" IROC Rims, 36mm/24mm Sway Bars, Global West Steering Brace. Hotchkis Rear LCA's,Panhard Bar and SFC's.
My Camaro Project

 

So.... How does it work? Is it a good improvement, just from the seat of the pants dyno? This is looking so good!!!

[This message has been edited by ahusted (edited September 26, 2001).]

 

Fast is fast, so I can't tell you if it'll make a differance at the track yet(I'm going Sunday). SOTP feeling, I did loose low end torque, it's not as easy to burn the tires as it used to be silly burning them.The top end is alive, I can't spend time in that area on public roads.

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86 Camaro Sport
383 Speed-O-Motive Crate Engine, Raptor 700R4 Tranmission, Trick Flow Twisted Wedge G2's, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Hooker Cat-back, Serpentine Belt Setup, Dual IROC Fans, Jamex springs, 16" IROC Rims, 36mm/24mm Sway Bars, Global West Steering Brace. Hotchkis Rear LCA's,Panhard Bar and SFC's.
My Camaro Project

 

Cool!! Thanks for letting us in on all the hard work you did! Some people would keep it to themselves!

 

Good job ! Looks great. Yea thats the one thing that I dident like when I drove an LT1, no bottem end grunt but then thats good, keeps a person more consistent off the line. Oh and I dident like that skip shift crap either but thats probably not an issue with your ride.

Again Good job! I look forward to reading your tech artical.
SSC

 

That is awsome... much better than the $1200 for the miniram. Keep us updated!!

Quick question: What is the stock bolt pattern on the LT-1, would it bolt up to vortec heads? Are there any aftermarket Lt-1 heads that would work on the L98 so that the blot pattern wouldnt be an issue?

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'89 Iroc-Z
350 TPI

 

I have never seen vortec heads, I would buy just the lower intake gasket set for those heads and lay them againest a LT1 intake.

Any aftermarket heads for a LT1 will have the same bolt pattern as stock, no matter what. GM never intended for use to do such mods, that's why the bolt pattern is differant.

 

Do you think that it would be worth the effort to put that on a 305?

Thanks,
Jesse

 

They don't recommend the Miniram for a 305 so I would think the same rules apply. The general rules are, displacement 350+, good flowing heads, cam with the right rpm range, low ratio rear axle and a higher then stock stall converter(automatic).

[This message has been edited by John Millican (edited September 27, 2001).]

 

Was it hard to do? There is a cab sitting in the junkyard right now with an LT1 still in it all together. Should I grab it?

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I WOULD RATHER PUSH A CAMARO THAN DRIVE AN IMPORT

1983Z28 350w/ edelbrock performer RPM power package , dynomax shorty headers, 700R-4 with shift kit, 750cfm carb, edelbrock 3" exhaust system, 16" IROC rims and ASCD SS hood.

future mods:
completely done over suspension, black paint with flames,
T-56 almost ready to go in, TPI swap coming up

Wifes new car:

95Z28, AT, leather, T-tops bone stock for now.

future mods:
header to tailpipe replacement and a cold air intake. Then I am just going to leave it alone

 

NICE!

Can't wait to see the track results!

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1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech chip with 160stat, MSD 6A, Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)

Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's, Accell 24# injectors

1989 Chevrolet Celebrity Eurosport <--DEAD AS OF 9/20/01
2.8 MPFI, no mods
225,000 miles and still ticking!

More info and pics on my webpage:http://go.to/iroc-z

AOL IMer: GPA 0point0

 

There are several problems with the STOCK LT1
intake but the ports and coolant passages are not one of them. What I did
before I started was get a cheap $6 intake gasket from DAP and just layed it
on the intake (already off the car), everything was perfect except for some
of the mounting holes, the 4 corner ones were good. No problem, I took the
gasket as a templet and drilled the new holes in the intake, no more
problem.

Problem #2, in case you havn't noticed there's no rear distributer on a LT1.
I had to drill the hole for it, warning-this hole must be in perfect
location. I used a old TPI base and made an aluminum templet utilizing the
rear two mounting holes to locate the dist hole. Distributer must be shimmed
about 1/4" higher due to the shortness of the LT1 intake. Also must use the
small HEI distributer with remote coil found on 1987-later.

Problem #3, No front coolant passages to return to the radiator. Well, I
just drilled and tapped two 3/4" heater nipples vertically where the coolant
would normally exit the head. I will run 3/4" heater hose to a remote
thermastst housing I found on-line. it will be mounted on the fenderwell. It
will use the same outlet neck and return to the radiator as it should.

Problem #4, must have custom fuel lines made to attach to the fuel rail of
the LT1. About $40 if you supply the ends. Available from Pep Boys

Problem #5, the was a temp sensor in the front of the TPI intake base, it's for the computer temp info. I will have to mod the remote thermostat housing for an additional hole.



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86 Camaro Sport
383 Speed-O-Motive Crate Engine, Raptor 700R4 Tranmission, Trick Flow Twisted Wedge G2's, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Hooker Cat-back, Serpentine Belt Setup, Dual IROC Fans, Jamex springs, 16" IROC Rims, 36mm/24mm Sway Bars, Global West Steering Brace. Hotchkis Rear LCA's,Panhard Bar and SFC's.
My Camaro Project