denmah

iTrader: (2)

540whp unlocked 17psi 12deg timing unlocked 80e

1969x11

iTrader: (36)

I was hoping to see more power out of that turbo. Should haul *** in the notch.

I8URLS1

iTrader: (15)

That would probably be close to 700 whp in a stick car. The track times will tell the real story

denmah

iTrader: (2)

also my dyno doesnt give out any free hp haha

dean85gt

iTrader: (7)

Seems low no?

JustAFooL

iTrader: (45)

Which 7875 is this?

I8URLS1

iTrader: (15)

On3/VS racing version

cstrohpaul

Thanks for posting this matt I just bought one of these 2 weeks ago but I don't have the car done yet so at least I know not to go through the trouble of building a hotside around it.getting rid of it and going with a 475

2002camaroSS

iTrader: (8)

Did you build the trans mount for the 4l80? How's the trans tunnel room with the 4l80?

Jetn3

What stage ljms cam? If its a custom ljms, what's the specs?

408GT

iTrader: (2)

Denmah has built his own crossmembers for 4L80E's in other Fox bodies. Not sure if he did this one or not.

In my experience the trans fits well, but if you put it up high in the car the round plug on the driver side hits the tunnel. I usually test fit, mark it, pull it back out and go to town with a bfh to make sure it'll plug in. The crossmember will be quite a bit rearward of the stock mounts.

turbotater1

what would the performance difference be with the 76 mm gt 45 from VS?

when will this rocket hit the track?

jaydubb

Hey Denmah.

Maybe Im trippin but didnt a 7665 make more power on that 300zx with the 4.8? With less boost at that? do you think this is an issue with the 7875? Im considering buying one since I just got a 5.3.

I8URLS1

iTrader: (15)

Not sure what trans was in the 300zx but 4l80e + unlocked converter is eating up a TON on the dyno numbers. I would wait until they get this car to the track.

For reference VS racing uses this turbo on a 6.0/6 speed car and makes 862whp on 20psi

denmah

iTrader: (2)

you are correct, the 300z has a manual trans, and this car has always dyno'd low, but gone fast at the track.

as i learn more about motors i start to wonder is the cam timing off on this motor slightly? probably, i think that is the issue with the turbo truck also.

i bought a degree wheel and i will be investigating poor performing combos

also the VS 7875 might not actually be the same size as the on3 7875, i dont really know

the 300z was a 4.8l with a ls9 cam also 7665 turbo

i think that this larger cam might be over running the 75mm turbine? unsure?

it would be neat to put a ls1 cam or ls9 cam in this car and see how it affects power, if its still low i would suspect cam timing or something else maybe.

im not an expert but im learning more everyday haha

denmah

iTrader: (2)

ive done 80es in fairmonts, and i just build a brace from the subframe or frame connectors underneath that goes strait across, you do have to hammer slightly

but they go in pretty easy

I8URLS1

iTrader: (15)

Denmah just for reference the VS racing and on3 7875 are identical in wheel sizes and construction. The VS racing just doesn't say anything on it. You have a good working relationship with VS racing it appears, I'm sure he could verify that for you as well.

I also wouldn't be surprised if the trans/unlocked converter are eating up 25-30% over what a 6 speed would show on the dyno. It's just a number and a tuning tool people fail to realize that all too often. When that car goes 140+ making 540whp then people will get it.

denmah

iTrader: (2)

put it this way, my friends cobra on this dyno made 470whp and went 10.80s @ 125mph at 3900lbs

Forcefed86

iTrader: (4)

In for results...

BOOSTAT4500

iTrader: (17)

What are your thoughts on this turbo on a 6.0? Fox body, 4l80e also.