BIGJOE707

I put a ZZ3HO motor in my 89 IROCZ and put my stock TPI on it I had a 305 I was able to get a 89 Corvette manifold up TPI and distributor is this an upgrade?

KyleF

Your 305 had 19# injectors stock, the 350 has 22# injectors. Since the ZZ3HO is a larger motor..yes it is an upgrade.

The Corvette also has aluminum heads, and the tuning is a bit hotter due to this. You factory 305TPI tuning isn't going to agree well with a larger motor, higher lift Cam, and larger injectors. Being that 89 was still MAF, you will probably get away with it as far as it should run and operate, but you will need some tuning to get the power out of it. However, the ZZ3 Cam is a good match overall to the TPI manifold and you now have aluminum heads. Should be a fun combo, but do think you will need a custom PROM to really tap into the extra performance.

BIGJOE707

What spark plugs do you recomend getting

Tuned Performance

iTrader: (92)

opps wrong plug

KyleF

This is the plug for the Iron Head L98 as Tuned Stated


This is the plug for the Aluminum L98 Heads with angled plugs. I believe the ZZ motors came with aluminum heads. Which would make these the correct plugs.

cuisinartvette

dist and intake wont give you any more power the vette L98 wasnt anything special

thtanner

iTrader: (1)

As stated, the "TPI" portion of the Vette is the same as any 305 or 350 camaro/bird. The injectors will differ between engine sizes (22lb for 350, 19lb for 305) and that's about it. Same throttle body, etc. Difference is lower manifold won't have internal EGR provisions and be setup for external EGR.

The vette's engine has aluminum heads, that's where the difference mostly is, not on the intake side.

Pearlwhite88

Anybody have any info on installing a weiand/holley stealth ram on the L98?

thtanner

iTrader: (1)

It's bad manors to post in someone elses thread asking for completely separate information.

2) https://www.google.com/search?client...th+ram+install

It is absolutely amazing what a simple Google search can turn-up. It's the absolute fastest way to search the decade+ of information here.

Pearlwhite88

Yea and there is no direct answer you could search for 3 days and find a 100 different answers from people who have never installed 1 every other person say you need to tune it some say you dont I am looking for someone that can tell me the experience they have had so any discussion with intakes doesnt seem far off the subject I would think maybe you should stop trolling to complain why would you be sitting here answering back in 1 minute do you have anything else to do on a Sunday afternoon

thtanner

iTrader: (1)

I am not trolling, just pointing you in the right direction because.. boy.. you sure need it!!!

1) you posted in an unrelated thread

2) I did the work for you, and linked you to literally a ton of threads with tons of information.

God forbid you lift a finger and read the information that was presented. You don't need someone to come in and hold your hand. Just read the g'd existing posts. It's not rocket science guy. You aren't making a Lunar lander here.

And if you change anything major on your engine, yes, you'd want to tune it. That goes with any change that will lead to notably more air or fuel needed...

Pearlwhite88

1.Still trolling
2.panties are now in a bunch
3.intake questions are not related?
4.must not have a life if your here on a sunday afternoon worrying about something so petty

thtanner

iTrader: (1)

Difference between 89 Vette and 89 IROCZ TPI

ray jr

iTrader: (2)

seriously dude why not start your own thread on the subject instead of posting in someone else's .. you may get more help

KyleF

Yes, because most likely if someone has reached the point where they are installing one of these manifolds and making such investment there are other things that have be done with heads/cam/headers/displacement etc. Maybe you don't understand that you have actually found your answer... there is no one size fits all answer on this topic... and tbh there is not.


See above

Welcome to the internet. I don't know what to tell you, but expect all kinds of different answers from all kinds of different people. This platform (TPI) is almost 35 years old. A lot of us have been around through those years and on these boards for near 25. People have seen a lot, heard a lot, and done a lot. Additionally there is a wealth of engineering knowledge on this board that understand what 2 different parts or certain parts are supposed to do or how they are supposed to function. Not everyone has to install something to have knowledge on the subject.

You need to tune it to get the most out of it period. Again, refer to my first statement. This is not an inexpensive modification. What kind of performance increase are you looking for? Something worth the $1000+ you paid for that manifold? It dang well better be changing things enough that I need to tune it or I dare to say it's not worth it. Will it run without a Tune? Probably. Will it make more power? Maybe... Will it be optimized? Not without a Tune. With the short runner style manifolds you are changing the complete breathing characteristics of the engine.

Yes, there is certain experience of how did you reach this, what tool did you use to do that kind of information only someone who has actually done it can have and would be completely irrelevant to the original thread if that is what you are looking for.

You wanted quick responses. Seriously, what you are trying to ask has nothing to do with the differences between two factory intake manifolds are.

Pearlwhite88

I paid 424 for the intake was debating using it and if it is even worth the money i think i will just stick with my stock ive had this car for 20 years now have been happy with it but need to do some top end work thought i would just upgrade but really it ran fine for me power wise an i like the stock tpi look any way so i guess ill just sell it

KyleF

I am still waiting for the OP to confirm if his ZZ3 has angled plug aluminum heads.

KyleF

Sorry, I was thinking about a Different Ram manifold, heck a set of TPIS or AS&M Runners are going in the $500 range. Still, changing the runner length on the TPI is going to change it's breathing characteristics. You will want the tune adjusted in certain areas to optimize.

If that pic you posted is of your car, looks like you already have SLP Runners.

Pearlwhite88

yea they are slp runners this car from the dealer with slp runners exhaust and a cold air intake ive had it for 20 years i am the 2nd owner i was going to put a stealthram on it but i am gonna keep the way it is

KyleF

Does it also have a "ECM Calibrator" as part of that package? If so, that is a custom tune they developed off their modifications.

TTOP350

iTrader: (8)

In my experience with slp chips, the stock tune was better and faster.

KyleF

On a factory car or a car with their modifications? I never had a car with he full SLP package to compare.

TTOP350

iTrader: (8)

Both.

KyleF

Great... Dyno graphs, Timeslips?

SLP has been a pretty reputable company along with TPIS supporting the F-Body platform over the years. While I have no experience directly with their chips in my car to say... but that's a pretty stout claim to call on SLP. Especially since they were delivered at the dealer with the PROM and warrantied against running issues for 36K miles.

TTOP350

iTrader: (8)

I've been buying and installing SLP parts for my cars and many others since the early 90s, Other than a few small things, parts are good, no problems there, tpi tuning or lack of was most of the issues.
Pretty much all of the ink on my time slips from the early 90s to mid 2000s have faded away.
The chips are not a lot better than the factory, a few degs of timing and dash of fuel here and there from what I'm told by guys that have looked at them side by side with factory tunes. (I'm not a chip tuner at all) Driveability (esp on the 91-2 firehawk) for some reason wasn't the best either. Poke around on here and you may find a few threads about their chips (and other aftermarket ones too).

Tuned Performance

iTrader: (92)

I have looked at several slp tunes. A comparison The slp 40054 only changes knock retard in power enrichment.
Not that great of a tune over stock aujp.

KyleF

Wish I had seat time in a Firehawk to know. I wouldn't expect them to be radically different than stock either. With the bolt on changes they are making I wouldn't think it would be something that would require major changes. SLP had a cam for the TPI, but I don't think they ever included it as part of the package. Probably couldn't get it passed emissions.


Again, I would say they had to be conservative being that it still came with a warranty when you picked it up from a dealer. I would be more interested (in the spirit of this thread) to see what their tune was for the T-ram that altered the runner length more significantly, like the HSR.

Pearlwhite88

I can tell you that with my slp upgrades my iroc pulls pretty good and it doesnt fall flat on uts face when the rpm's get up there

KyleF

I had the SLP cam, runners, and port matched (not completely ported manifold) on a 355 back in an 86 Trans Am. It was done at about 5200 RPM.- being generous. The Siamesed runners don't take that much length out of the intake track. It's just simple physics.

Pearlwhite88

I think im around 55 5600 but im just kinda settling down just more of a cruiser now, it's currently in the paint shop was factory white with grey interior now its ice pearl white with black interior the original seats are getting redone in black leather just giving it a face lift updating the tunes too
I was going to make it a 383 with a stealth ram

KyleF

Get AFR 195 Heads and a 224/224 or so Cam and that should be a screamer.

TTOP350

iTrader: (8)

SLP offered 3 roller cams. I've put the wrong part number (50006 on one instead of 51006). the 2 smaller cams, 51002 and 51006, were 49 state legal iirc, I'll check my old catalogs and update

The T-rams runners are 11.5" long but ports are larger and way more plenum volume to draw from.

KyleF

With two separated plenums. I would think this would do a lot more to the breathing characteristics of the motor than just their bolt on runners.