L98 Performance question
Team Owner
Joined: Sep 2001
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
hate to bring the ld thread up but im going to start acquiring parts for this job over the summer. but before i do i have a couple questions.
The egr is under the TPI right? will the crate motor be fine with an EGR (or should i delete)
is there any issue with it being deleted, i dont want to stare at a check engine light all the time :P.
Headers are the next issue, i dont believe my stock shorties will fit with the fast burn heads, is there a certain brand i should be looking at like off of an LT1?
can i use my stock injectors or should i be getting different injectors and rails?
im not trying to make it reach the HP it was dynoed at. but still want it to run properly and make the car a bit more unique for me. plus its a fun project for me and the old man to tinker with this coming winter
ill start a build thread when it starts to happen
The egr is under the TPI right? will the crate motor be fine with an EGR (or should i delete)
is there any issue with it being deleted, i dont want to stare at a check engine light all the time :P.
Headers are the next issue, i dont believe my stock shorties will fit with the fast burn heads, is there a certain brand i should be looking at like off of an LT1?
can i use my stock injectors or should i be getting different injectors and rails?
im not trying to make it reach the HP it was dynoed at. but still want it to run properly and make the car a bit more unique for me. plus its a fun project for me and the old man to tinker with this coming winter
ill start a build thread when it starts to happen
EGR removal will require the Code 32 and related EGR function to be removed from the chip when it is done, simple for the tuner to do that for you. No real downside to removing it entirely for your engine.
Do a search for anyone who has used Fastburns and see how they fit with headers before you pick the header brand.
For that engine, you will probably be going with bigger injectors, but it's going to depend on exactly what the combination is as to what size. I'd talk to the chip tuner. The rails are fine.
Team Owner
Joined: Jul 2004
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From: Hartford WI
Change your profile to include your location. Some members might have a person who can dyno tune it for you. I am running 42pph injectors doing about 420 at the wheels if that helps you out. Regardless, you should be able to ask the tuner what he likes best for the combination. Also you probably will need to rebuild your transmission sooner or later if it is auto. Not sure about stick. Rear end will not hold up for long if it is an auto since they have the D36. I'd suggest finding the dyno tuner first and asking him what he recommends for a cam, intake, etc, etc.
Thread Starter
Instructor
Joined: May 2015
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From: prince george bc
trans has 40,000kms on it since rebuild but it will be going in to get a look over, yes it is an auto. the car is just a daily driver with the occasional fun spurt, nothing serious no racing or anything like that.
i will ask the fellow thats tuned all my vehicles and see what he know and recommends
i will ask the fellow thats tuned all my vehicles and see what he know and recommends
Team Owner
Joined: Jul 2004
Posts: 28,378
Likes: 3,261
From: Hartford WI
trans has 40,000kms on it since rebuild but it will be going in to get a look over, yes it is an auto. the car is just a daily driver with the occasional fun spurt, nothing serious no racing or anything like that.
i will ask the fellow thats tuned all my vehicles and see what he know and recommends
i will ask the fellow thats tuned all my vehicles and see what he know and recommends
Does he dyno tune or how does he do it? Dyno with some driving is best of course. other than that, I want someone who will adjust it based off datalogging. The "Mail Order" tunes are basically "Guess a tune", IMO.
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From: prince george bc
ok ill get the trans to have a better look, he gets people to take you for a drive while he watches and tunes and adjusts things (this is what he has done with all my trucks) couple wide open pulls etc etc. he is a Gm master technician as well that works at my local chevy dealership
Thread Starter
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From: prince george bc
ill also read up on headers, my biggest concern was the egr (which is no longer a concern) and now the injectors as fuel injection is not something i play with a whole lot on the older stuff. racecar is carbed so its really easy to work on :P
im assuming this motor is going to be chocked down, it was dynoed with a carb at 424hp at the crank, so im assuming it will probably fall below the 400 mark a ways with the fuel injection setup
im assuming this motor is going to be chocked down, it was dynoed with a carb at 424hp at the crank, so im assuming it will probably fall below the 400 mark a ways with the fuel injection setup
Last edited by leadfoot33; Apr 5, 2017 at 02:04 PM.
Team Owner
Joined: Jul 2004
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From: Hartford WI
ok ill get the trans to have a better look, he gets people to take you for a drive while he watches and tunes and adjusts things (this is what he has done with all my trucks) couple wide open pulls etc etc. he is a Gm master technician as well that works at my local chevy dealership
Team Owner
Joined: Jul 2004
Posts: 28,378
Likes: 3,261
From: Hartford WI
ill also read up on headers, my biggest concern was the egr (which is no longer a concern) and now the injectors as fuel injection is not something i play with a whole lot on the older stuff. racecar is carbed so its really easy to work on :P
im assuming this motor is going to be chocked down, it was dynoed with a carb at 424hp at the crank, so im assuming it will probably fall below the 400 mark a ways with the fuel injection setup
im assuming this motor is going to be chocked down, it was dynoed with a carb at 424hp at the crank, so im assuming it will probably fall below the 400 mark a ways with the fuel injection setup
If you choke it with a lousy intake and crummy exhaust manifolds, sure.
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Thread Starter
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Joined: May 2015
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From: prince george bc
I doubt tuning of chips is a GM sanctioned activity. Still, I guess I am more comfortable with a dyno telling me we maxed out the power and other sensors hooked up to read data streams and see gas output, etc. When we tuned for power, that is what we did. Set a base tune, increase, increase, increase till it leveled off and went downwards. After that, we went back and settled that one.
Team Owner
Joined: Jul 2004
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From: Hartford WI
No the tuning is his side business. He just happens to be a gm master tech as well. I know what your saying that way does work best but noone in my town has that hes the only one that does any kind of local tuning. I figured him being in the car was better than a boxed tune or somthing like that. It will be w fun project and i will have tonnes of questions. Me and my paps were just talking about it last night and i thought of these few things and wondered if it would be cheaper to slap a better cam and get head work done to the stock motor. Vs trying to find parts for the crate. But it seems the crate is the way to go unless you folks think the stock heads with work done and stock intake with a cam would work well.
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From: prince george bc
might be somthing i have to look into a bit further and talk with a few people. Who does tuning for these cars that is knowledgable about them and could give me some more guidance. I love lesrning about this stuff and the more i know the better prepared ill be for the job.
Team Owner
Joined: Jul 2004
Posts: 28,378
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From: Hartford WI
might be somthing i have to look into a bit further and talk with a few people. Who does tuning for these cars that is knowledgable about them and could give me some more guidance. I love lesrning about this stuff and the more i know the better prepared ill be for the job.
Thread Starter
Instructor
Joined: May 2015
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From: prince george bc
i do know a fellow with a dyno he is 8 hrs away but i dont know when he will be available again as he had a freak accident happen to him, he also coincidentaly rebuilt this crate motor 2 years (this crate has been balanced and blue printed all with the stock gm parts)
ill do some more reading on the headers and ill see if the tuner in town knows much about the injectors for this thing and ill try the engine shop i know.
lots of reading and thinking to do :P
any and all opinions are welcome here
ill do some more reading on the headers and ill see if the tuner in town knows much about the injectors for this thing and ill try the engine shop i know.
lots of reading and thinking to do :P
any and all opinions are welcome here
Team Owner
Joined: Jul 2004
Posts: 28,378
Likes: 3,261
From: Hartford WI
If you need larger injectors, it is in the equation and he should be able to adjust the injector constant in the program.
Team Owner
Joined: Jul 2004
Posts: 28,378
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From: Hartford WI
I know that my F-body had an Accel Tri-Y header but I don't think LPE makes or sells them anymore. Those dropped in nicely. Hookers were a PITA to get in and access was more tricky. I don't have personal experience with Melrose and nobody seems to say whether it is hard to get stuff in or not. Someone said it needs to be ground down to fit. IDK.
Instructor
Joined: Sep 2016
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From: Milwaukee WI
https://www.tpis.com/parts/view/159
https://www.tpis.com/parts/view/160
TPiS claims 24 lbs/hr is good up to 450 HP, seems like that'd be pushing the limit though. They have 30 lbs/hr injectors for the same price that should be great.
https://www.tpis.com/parts/view/160
TPiS claims 24 lbs/hr is good up to 450 HP, seems like that'd be pushing the limit though. They have 30 lbs/hr injectors for the same price that should be great.
Team Owner
Joined: Jul 2004
Posts: 28,378
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From: Hartford WI
https://www.tpis.com/parts/view/159
https://www.tpis.com/parts/view/160
TPiS claims 24 lbs/hr is good up to 450 HP, seems like that'd be pushing the limit though. They have 30 lbs/hr injectors for the same price that should be great.
https://www.tpis.com/parts/view/160
TPiS claims 24 lbs/hr is good up to 450 HP, seems like that'd be pushing the limit though. They have 30 lbs/hr injectors for the same price that should be great.
32 pph
Instructor
Joined: Sep 2016
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From: Milwaukee WI
No doubt, I totally agree FIC is likely a better place to get them (I have a set myself). I was just looking for what other places recommended for his expected HP output.
Jon is a good guy and has helped me along the way with my C4. :-D
Jon is a good guy and has helped me along the way with my C4. :-D
Instructor
Joined: Sep 2016
Posts: 129
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From: Milwaukee WI
https://fuelinjectorconnection.com/c...l-injector-set
Those ones are $199r and would be fine too. I like the color of those 32lb ones though. :P
Those ones are $199r and would be fine too. I like the color of those 32lb ones though. :P