Got The J30-TT Yesterday!

[diamond]

its possible.takes some work tho id imagine.to make a dependable 400.id like to see a dyno sheet when done.see how close it gets.would be interesting.i forgot its a t.t. motor.im brite.i shouldnt even post no more.im to far gone,lol.

[Rex]

This car and another one just like it was for sale on ebay and then locally (1 in NY/NJ, 1 in MD). I'm fairly certain a few other swapped J30's exist and I'd like to see the owners find their way to NICO.

As for the numbers JWT "offered", based on the wording, it appers to be flywheel numbers not rear wheel, and also factor in the boost he's running, don't think that's stock boost.

A dyno sheet would address alot of questions for sure.

[elwesso]

stock boost on a TT is like 9-10 lbs... so you are increasing boost 40%, so assuming everything is the same (its not) you should have about 420HP (thats assuming 300FWHP @ 10lbs of boost).. however, you factor in heat losses (the turbo isnt going to be as efficient at 14lbs of boost as it is at 10) you get a nice drop, but then you factor in the other stuff he said (ECU, exhaust, intake) and i think its believeable...

IF we want to compare drivetrain losses, lets say a stock Z32 is 300HP and has 22% drivetrain losses (may be less than that with the MT and upgraded clutch, but lets assume this for the time being), thats 234 RWHP (300x.22=66 300-66=234)... Similarly, with JWT's estimate he is saying 308 RWHP... assuming the same 22% drivetrain loss (396x.22=87.12 396-87.12=308.88).... so its about 75 HP your getting by increasing the boost by 4 lbs and all the other crap.. ~18HP per lb of boost with all that other stuff is not out of this world!!!!!!

Anyway, JWT also tends to be very conservative in their numbers and their tuning.. JWT does a very good job in factoring in everything, so if they say 396 HP at the flywheel, i will believe them.....

[Skapunk4everr]

but we still need the dyno and more pics...

[93j30t]

don't you mean rwhp?

[yodawill2000]

Thats what a dyno measures

[elwesso]

but we still need the dyno and more pics...

obviously, no excuses, just throwing in ym .02

[Rex]

stock boost on a TT is like 9-10 lbs... so you are increasing boost 40%, so assuming everything is the same (its not) you should have about 420HP (thats assuming 300FWHP @ 10lbs of boost).. ...

Are you saying a 40% increase in boost increases you HP by 40%?

Cause that's what your math appears to reflect?!!?!

[elwesso]

Yeah, thats right, whats wrong with that? 40% more air means you cna burn 40% more fuel and thus create 40% more power, or am i missing somethign?

[yodawill2000]

~~Buys Popcorn~~

hehe

[Rex]

Yeah, thats right, whats wrong with that? 40% more air means you cna burn 40% more fuel and thus create 40% more power, or am i missing somethign?

40% more boost, so you'd want to identofy how much HP the original boost gets you.

The motor under normal load should not be boosting or very little, and it must create some power. So, the stock boost the gains XX hp, and the 40% increase would gain more HP, but not 40% more HP.

[brandonjustice93J30]

with that idea, you could estimate using that a N/A 300ZX produced about 222 hp, so if a TT version puts out 300hp @ 6400rpm , there's an 78hp difference. 40% of 78hp would be 31.2hp.

which wouldnt be too far fetched of a figure

however at the same moment, the compression ratios might be different on the N/A and the TT...so...the TT without boost could produce less hp than the N/A, based on compression ratio figures. so there could be more than 78hp being made by the turbos, you'd just have to dig deeper and see if anyone's bothered to dyno a TT with nothing attached to get a baseline.

[Rex]

... however at the same moment, the compression ratios might be different on the N/A and the TT...so...the TT without boost could produce less hp than the N/A, based on compression ratio figures. so there could be more than 78hp being made by the turbos, you'd just have to dig deeper and see if anyone's bothered to dyno a TT with nothing attached to get a baseline.

I strongly believe that is the case, but don't have any dyno numbers to prove it. Someone should ahve the CR for the N/A and TT motors to add credibility though.

[brandonjustice93J30]

I found this online....."The N/A Z has 222hp at the flywheel. To accomplish this, it's compression is bumped way up to about 10:1. The turbo's compression is about 8.5:1."

[KUL FIR CHICK N]

Check out a few 300zx tt sites. With this motor, 400hp is child's play, BUT there are a few things that need to change on that setup first. The stock filter and pipes are probably too restrictive. Those intake bellows (hooked between the turbos and throttle bodies) will blow up like balloons at 14psi, I've seen it.

Work out a few bugs and that car will embarass a few m3's

[95-J30tt]

any more pics please ..... that swap is amaizing......

[93j30t]

in all honesty i still don't believe the guy on the swap.. don't get your hopes up

[KUL FIR CHICK N]

Did I miss something? Is there a history before this thread? Why is it so hard to believe? Do you not believe he has a swap motor or just don't believe the hp estimate? By the way, he was only stating an estimate, which is entirely possible with the tt motor.

Also, the numbers are always flywheel HP as rated by the factory. Rear wheel HP is what some people talk about only because its easy to put your car on a RW dyno and get a number for bragging rights. They are both measuring the same thing, the RWD just has drive train losses added to the mix.

I don't want to muddy the waters with a dyno discussion, but his estimate HP figure was flywheel.

[DominickJ30]

What do you not believe???

There is a picture on a J30 engine bay with the VG30DETT inside, on the first page.

[93j30t]

yes, but in all honesty i could use photoshop for that myself... he doesn't show under the car or any other angle or any close up picture (see my reason on the other page) he's posted one pic on a MAJOR motor swap from which i've been told on 8 ocassions was not possible/feasable to do

[DominickJ30]

yes, but in all honesty i could use photoshop for that myself... he doesn't show under the car or any other angle or any close up picture (see my reason on the other page) he's posted one pic on a MAJOR motor swap from which i've been told on 8 ocassions was not possible/feasable to do

Honestly, why would someone take the time to make a photoshop of this to brag about on NICO.

Believe me, anything is possible if you put your mind to it. Or if you pay someone alot of money. Either way its possible.

[lyon23]

... he doesn't show under the car or any other angle or any close up picture

sounds like someones wants a closer look to see how it was done so theyc can do it themselves.

Just my $.02

[95-J30tt]

i would really like to see some more pictures up close of the engine in the car.... , i also have some questions, would the tt trany "RE4R03A" fit in with no problems?, and is it mandatory to change the fule pump, upgrade brakes and so on..... i also heard that the ECU wires for the 300zx tt are shorter than those in the j30, is that true?.... i would like to see more engine bay pictures whenever possible

[93j30t]

nah

sounds like someones wants a closer look to see how it was done so theyc can do it themselves.

Just my $.02

if it could be done and if i wanted a turbo J, i woulda done it by now.i've had plenty of money and no one local would do it. (can't be done, will cost 30k) i've given up on it since the J and I are about to take seperate paths in the future (looking for less doors) people put stupid **** online all the time saying they did it. Come on now, do you believe every picture online?

[driftkaztik]

i posted that car for sale on this forum... and drape bought contacted dude and purchased it. thats all i know.

[elwesso]

Ive seen this car before (not in person) for sale somewhere else..

Its for real.

[DominickJ30]

nah if it could be done and if i wanted a turbo J, i woulda done it by now.i've had plenty of money and no one local would do it. (can't be done, will cost 30k) i've given up on it since the J and I are about to take seperate paths in the future (looking for less doors) people put stupid **** online all the time saying they did it. Come on now, do you believe every picture online?

lol, it can be done. Its obvious that the "people" you went to saw a young kid who dont know much about cars trying to get a turbo engine from another car swapped in, and saw an oportunity to make 30k

[AZhitman]

Yeah, thats right, whats wrong with that? 40% more air means you cna burn 40% more fuel and thus create 40% more power, or am i missing somethign?

Wes, you were a NINJA right up to this part.

Boost returns are not 1:1.

For that matter, 10% more airflow + 10% more fuel in an N/A engine doesn't = 10% more power.

This is a great thread, BTW. I wanna see more pics of this J.

BTW, for the naysayers, I have observed a J30 with the swap as well. It can and has been done...

[93j30t]

well first off, do not attempt to say i don't know anything about cars. you don't know me and i have yet to attack your intelligence so don't try mine.

secondlyif the swap had been done and not "bought off ebay" because we all know that ebay is a completely safe and non deceitful website /sarcasm we would see more pictures than just a front view of the car. like on my main forum http://www.automotiveforums.co...62866 a buddy there did a supercharger on a truck. did he post one picture and say "believe me..." he posted plenty to back himself up.you can believe this guy all you want. he has yet to post any other pictures so i'm going to assume he's lying. I'll save fairy tales for the authors. And 30 thousand dollars for a complete 10k vg30dett engine plus all modifications needed to be done to the bay, plus the transmission, plus all other necessicities (intercooler, etc) plus LABOR is about what i would charge to anyone wanting me to damn near do the impossible. you can back him up until there's no room left, but the simple fact is, he's only shown one not so convincing picture, put up or shut up.

[elwesso]

Wes, you were a NINJA right up to this part.

Boost returns are not 1:1.

For that matter, 10% more airflow + 10% more fuel in an N/A engine doesn't = 10% more power.

This is a great thread, BTW. I wanna see more pics of this J.

BTW, for the naysayers, I have observed a J30 with the swap as well. It can and has been done...

You might say its 10% mroe power BEFORE friction losses. I dont know im just trying ot make myself right.

Anyway... BAH to the naysayers... The twin turbo J30 is scary easy and im surprised it hasnt been done more!