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How much hp does a vr4 support we currently have a upgraded sn93 from craig at paradise wheels on my wifes 91 z28 350 tpi we love it. I just got done building her a 89 iroc with a 383 fully forged stroker I just bought another sn93 kit I take to Craig he said he is making vr4 kits again I'd love to have this one converted to a vr4 will it support a 383 stroker how much boost will it make I also have the paxton oil cooler to keep it cooler any help would be great thanks
That's the 89 with the 383
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Here is her 91 with the upgraded sn93
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Here is her 91 with the upgraded sn93
I read they have made up to 600hp but every combo will be a little different. The downside is they will make a ton of heat.
Will it support a 383 tho? And if it makes 500 hp I'd be very happy.
Is the vr4 capable of doing it with the right setup yes. Will it do it on yours I have know idea.
What's the build. TPI 383?
Ours is a 383 fully forged stroker,113 d port Corvette aluminum heads ported polished lpe219 cam first performance intake 36 lb injectors edelbrock headers into a 4.5 inch mufflex exhaust this is all controlled by a holley hp efi system.Quote:
Originally Posted by ruffneck
Car is running low 12s few tweaks to the tune should be high 11s on motor
Ours is a 383 fully forged stroker,113 d port Corvette aluminum heads ported polished lpe219 cam first performance intake 36 lb injectors edelbrock headers into a 4.5 inch mufflex exhaust this is all controlled by a holley hp efi system.Quote:
Originally Posted by ruffneck
Car is running low 12s few tweaks to the tune should be high 11s on motor
Thats a tough little 3rd gen already. What are you making now 400 whp?
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Calculators put it around 370 ish at the rear wheels that was my wifes 1 passes she didn't even launch off the convertor she just rolled off should go a few tenths faster once she is used to it.. but I bought her the blower to match her 91 z28 this one i want upgraded to the vr4 to support the 383
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Calculators put it around 370 ish at the rear wheels that was my wifes 1 passes she didn't even launch off the convertor she just rolled off should go a few tenths faster once she is used to it.. but I bought her the blower to match her 91 z28 this one i want upgraded to the vr4 to support the 383
I believe you would be close but it's going to make alot of heat. If you added meth to bring the iats down. The 36s are going to be close to being maxed out and your probably going to need about 300lph fuel or more to support it.
370 is probably right i made 345 on a dyno and I ran 12.4s. 88 or 89 GTA
Not worried about changing Injectors that's easy with a Holley hp the fuel pump is a 340 lph walbro already..meth injection is a must we have that on her other one..also going to run the paxton oil cooler to help heat in the head unitQuote:
Originally Posted by ruffneck
Sounds like you're good to go then. I'm putting together a gen1 Lightning now with a VR4. It's stock other than 36# injectors and a holley hp. Man I love the Holley. I've went to the Holley school last year well worth the money in my opinion.
Holley is awesome I changed the shops tune I was afraid lol he had the wot timing set a little high for my blood and he had air fuel 13.0 at wot but now im wondering if I should put it back and have her a take a pass see how it performs if I can get this to run 11.9x I'd be pretty happy considering it's full weight and still retains AC lol
VR4 has a lot of potential for vintage Paxton superchargers as well. Hopefully Craig gets some impellers and kits developed. I've experimented with VR4 style impellers and the increase in boost and cfm's is significant over the traditional SN/SN high efficiency impeller. I'm using the improved SN impellers in the vintage VR57 supercharger rebuilds which are converted to SN type internals. I looking forward to am introduction of VR4 impellers for my '57 Ford with VR57/SN blower.
I currently have a vr4 on a 93 5.0 mustang and it is beyond fast low 11s but it makes tons of heat!! You need a bigger cooler than what he gives you! He gave me wrong races in a rebuild also. I was very annoyed!! The vr4 was the ball drive of the novi 2000!! The vr4 is a good blower!!!
I would at least go with 42# with the vr4
New billet VR4 Impellers and Rear Housing Modifications are finally available at Supercharger Rebuilds out of Dallas,Texas.
You can contact them at sales@superchargerrebuilds.com