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My friend just purchased a 1996 Grand Sport with the LT4 engine. The Grand Sport came with a Blower. The vehicle dyno said it has 502hp
He wants to put the Grand Sport back to OE condition. He said I can have the Blower. I have a 1995 LT1. First question will it fit??? 2nd question; How much additional HP could I expect when tuned?
My friend just purchased a 1996 Grand Sport with the LT4 engine. The Grand Sport came with a Blower. The vehicle dyno said it has 502hp
He wants to put the Grand Sport back to OE condition. He said I can have the Blower. I have a 1995 LT1. First question will it fit??? 2nd question; How much additional HP could I expect when tuned?
Your help and experience is appreciated
Thank you
Hi
The blower is part of a package, to make the power a lot of engine mods would have been done.
Not to mention the chip, I think he should sell the car to someone that will pay for a beast of a C4.
Then buy a LT4 C4 witch change left over....
It will cost a lot to get the blower setup a chip tuned, don't expect a standard engine to cope with high boost.
Talk to Blower works, he can put together everything you need and advise your best option.
While it's a good idea to build the engine for boost, it's not exactly nessecary. You could run 6 psi and probably be fine for awhile. Is it better to build the engine? Yes. But unless your tune is off and you religiously beat the **** out of it I think you'll be fine.
The next things to think about is your transmission. That will probably go befor the engine. Fuel System As well.
Also no chip is needed, you will need a retune though. You may get by with pcmforless / mail order to get you to the dyno but it would be best to dyno tune.
I would imagine the system will bolt right up as well.
While it's a good idea to build the engine for boost, it's not exactly nessecary. You could run 6 psi and probably be fine for awhile. Is it better to build the engine? Yes. But unless your tune is off and you religiously beat the **** out of it I think you'll be fine.
The next things to think about is your transmission. That will probably go befor the engine. Fuel System As well.
Also no chip is needed, you will need a retune though. You may get by with pcmforless / mail order to get you to the dyno but it would be best to dyno tune.
I would imagine the system will bolt right up as well.
This will be a major undertaking installing this system. on blowerworks.net there is a download section with the exact manual for this setup, take a look at that first. There is ALOT involved in this..
This will be a major undertaking installing this system. on blowerworks.net there is a download section with the exact manual for this setup, take a look at that first. There is ALOT involved in this..
Well, yea lol
I didn't say it was easy, but it's doable and everything he needs fits both cars. It's just if they are up to the task. Also needs to consider oil lines if it's not self contained in the head unit.
If I'm wrong about it fitting his car then someone chime in with why it wouldn't fit.
Ya to do it correct ATI Super dampener, 60Lb injectors Upgraded in tank fuel pump to name a few. Its not difficult but can be time consuming.
You have to get into the throttle before these things kick in its not noticable when you tap the throttle. ( not like my roots blower in my avatar )
Last edited by illenema; Dec 22, 2016 at 11:02 AM.
Oh, You lucky dude!
The only thing I see is the harmonic damper on an LT-4 is different from an LT-1 (a little heavier/thicker), but I think the blower drive damper from his car will fit your LT-1. Your LT-1 damper MIGHT fit his car, but if he wants to put it back original, he will have to locate an LT-4 damper. Other than that, I think you can swap the whole front of the engines from one car to the other, bolt for bolt. Most of the difference between the engines is internal except for the heads, but I think all of the bolt holes in both heads are in the same place. Lots of patience and some upgrading of the fuel system as mentioned above, and you'll have one rocking LT-1!
I guess you could call it an LT-1.5
The next things to think about is your transmission. That will probably go befor the engine. Fuel System As well.
Many years ago, I was a BMW sales guy. We always had to be very careful selling used M-series cars such as M5's and M6's. We would find large amounts of wear in gearboxes, differentials, driveshaft UJ's etc. We could spend a lot of money making a 4 or 5 yr old car good enough to sell.
Tell him you'll take it, I'll buy it for 500$ lol.
Should be easy to figure out the brand. Vortech, procharger are probably most likely the brand and they run 4-6k new. Can't believe he's just gonna give it to you. I'd be all over that.
The blower is part of a package, to make the power a lot of engine mods would have been done.
Not to mention the chip, I think he should sell the car to someone that will pay for a beast of a C4.
Then buy a LT4 C4 witch change left over....
It will cost a lot to get the blower setup a chip tuned, don't expect a standard engine to cope with high boost.
Talk to Blower works, he can put together everything you need and advise your best option.
Engine mods do not need to be done for a basic blower kit and you certainly don't add a chip. Use the CATS tuner and size the injectors and fuel pump accordingly. You'll be fine.
My 1991 has a Procharger 600B running at a low boost. The basic engine is stock. It did 319 HP at the rear wheels and 390 pounds of torque. The engine makes about 375 HP at the crank. Originally it was 245 at the crank. It now makes more power and torque below 4500 RPM than my slightly modified 2002 Z06. Here are the dyno charts. According to the local tuning expert and Corvette mechanic the engine will be just fine running as it is with no mods needed for reliability.
i have a blown 93 lt1, stock bottom end, lowered compression to 9.7:1, meth/water inj
p600b at 12 psi boost at 6000 rpm
runs fine no issues. a good tune, meth-water inj, and extra fuel pump capacity is what you need to avoid issues. a single detonation event would break something so you want to make sure stuff like meth/water inj is fail-safe if it malfunctions
as for cost:
if somebody gives you the blower then great!!!
you still have $4000 in supporting mods to go to make it work right without damaging your engine(.....bigger injectors, fuel pumps, tune, 6+8 dedicated drive superdamper, brackets (if this is the procharger kit beware their c4 brackets are garbage and belt-slip), meth/water inj......
Blower on 1995 LT1
There is ALOT involved in this..
Many years ago, I was a BMW sales guy. We always had to be very careful selling used M-series cars such as M5's and M6's. We would find large amounts of wear in gearboxes, differentials, driveshaft UJ's etc. We could spend a lot of money making a 4 or 5 yr old car good enough to sell.
