Greddy T-88 to borg warner 475
 

I am finally near the completion of this project. I am looking for a few suggestions on the fuel and the ignition system. Currently I have 1680s and 850s and and am still working on the install of the meth inj, my ignition is T2 coils with jacob ign. box.
I would like to make 700whp, 1st am wondering how much meth I would have to throw at it to make this work on c16, or would I need to go bigger injectors? 2nd I dont think the jacobs box on the T2 coil is going to cut it any longer with all the extra fuel being thrown at it, but I could be wrong that is why I am asking for help.:) So ideas on ignition for my setup would be great to. 3rd is turbo support, as this turbo seems to be alot heavier than my t88 was, do you think my greddy manifold will support the extra weight or will I need to help support this somehow? Any info is apreciated:icon_tup:

Here are a couple pics.

the s475 by 3 to 4 buss lengths

:lol: Im hoping so. Just need to take care of these few things then I can see:icon_tup:

Any suggestions?

The most important information you did not supply us with. What standalone are you running? At this point you have two choices; if you're running the Power FC you could run a couple more amps and get better coils, the next alternative is to purchase a standalone that has a built in ignition amp and you just pick your coils to match.

I chose to stick with the Power FC as I'm familiar with it. I'm running a custom ignition setup consisting of 3 ignition amplifiers and 4 MSD Blaster coils. You might want to not even think about all of this and ask the person that's tuning your car what he would prefer as it's only going to make him happier... You're just the driver :lol:

Thanks for your input, so you are confirming that my current ign. setup will not work? Sorry, I just installed a haltech e11 was running a Power FC. Tuner is happy with haltech.

I know there are many knowledgable people on this site. I always figured the more input you get, the better the outcome.

Did the S475 fit perfectly on the Greddy T88 manifold? Was there anything that needed to be modded?

Anthony

Not perfectly, there were a few minor midifications needed. I had a 5/8" spacer made that fits between motor and exhaust manifold to allow enough room for the turbine housing to clear the lim. This allows barely enough room for the wastegate to clear on the other side though. After that then cut aprox. 3/4" off the down pipe, and weld the new flange on. I did not have to do anything with the intercooler piping, same pipe fit, just had to rotate the turbo towards the wheel well and do a little trimming. Over all pretty simple:icon_tup:

If you are running the t88 kit I could send some more detailed pics if you would like.

You think the same would apply with a T-78 kit?

More important, 1. Who is your tuner?
2. Who built the motor and whats done?

Seven, what intercooler are you running?

Well, assuming the manifold and wastegate are the same (I am not sure on this) I would think so.

Karl Martin built the motor, and is tuning. The only thing that is not done to the motor that I stress about is that it has not been pinned. I THINK everything else is fine, large street port, 3mm seals, ...etc....etc Let me know what you think.

I am running the greddy 3 row from Ari's site, http://www.rx7.com/store/rx7/fdintercooler.html

It's the "....etc.....etc...." I'm interested in.

what's karl marting to these days? still have his orange car?

Well Karl has been in the game for about as long as I can remember so your in good hands there. Only thing you need be concerned with, is if the motor is clearanced for that kind of power. Any motor can hit a number, but you want it to stay together with that power over the long haul.

He is always busy with something it seems, a project here and there, alot of home improvements :lol: He has made himself a really nice place.

Yes he still has his orange car, he is trying to figure out what to do with it.

Thanks for the heads up. The motor has been clearenced, its supposed to be an identical build to his, so I would assume it is clearenced for some decent numbers. Hopefully it will stay together for a little while, seems like I have been working on it all winter long, I would really like to enjoy it for a few months during the summer.:icon_tup:

Now I just need to finish mounting the haltech, wire up the fuel pump, and find a base tune to get it started.:)

Any updates, Roky!!!!?????????????

Hey Tony,

I have had a few hiccups along the way with my current ignition system but I now have got them all sorted out. I have got all the light load tuning done so the car drives pretty good around town, but still need to get the meth kit installed so I can through it back on the dyno and have the tune finished and hope my ignition holds up.

Also I am now running an Apex fmic intercooler.

80 psi and a old bannna peel should get u there

Hate to bring this up from the dead but was this a T4 or T6 S475? I may purchase this turbo and want to make sure it fits.

Thanks!

The Greddy T88 is a T4, the BW S475 is a T6. The Borgs are setup in series, the 300 series are T4 (S375) and the 400 series are T6 (S475). Someone could potentially have a T6 flange machined and welded on the existing Greddy Manifold once they cut the T4 flange off.

Mark

Stepping down to an 87mm turbine opens up the option for a T4 turbine wheel. Its more expensive, but unless its on a 3 rotor, the 96mm turbine isnt necessary with the 75mm compressor.

Scorpion T is right, I cannot tell you how many times I have read that the 4 series is t6 flange only. However I purchased mine as a 475 with an 87mm turbine wheel and a devided t4 turbine houseing. :nod:

Well finally some progress. I have not had alot of spare time lately so unfortunately this has been on the back burner. I did make it to the dyno with Karl Martin to work on the tune. We were aiming to just get down a conservative map that would work temporarilly until we tuned with meth injection. Overall I am pleased with the results, 633rwhp at about 28psi, although I would like to see the power not drop clear up at top end. I am thinking this would not be so drastic if the map was not so rich there, hopefully this will be corrected next time on the dyno. I will probably not make it back to tune with meth and more boost until early spring. I am running q16 for fuel.

Nice numbers. Should be a hell of a ride.

S475 I tuned had the same drop up top, regardless of how high boost was raised or how lean the AFRs were. Trying a bigger fuel pump and better intake now..

I would like to know how this goes if you dont mind sharing.:icon_tup:

What size exhaust housing are you running?

The car I spoke of used a T6 1.32 with dual open Tial 44s and 4" exhaust. No restriction there..

What port Turblown? I have run the same turbo and power did not drop off at all.

I also run a (T6 1.32 A/R) S475 and at 9300rpm power is still climbing. this is with a half bridge port and rxparts.com intake manifold. I think the T4 back housing is holding this car back...

Large street-port. I didn't build the engine so I don't know exactly..

Thanks for sharing the numbers. The drop seems to be as per T88 I use on my car, but with less boost and less power you have made (mine is D33 with 18cm2). I was thinkng of going the BW475SX3 route as well. However, you can get different exhaust hausings for the BW475SX3, what size are you running, or what size was it on for the above dyno run?

I am running a t4 1.10 hot side and 4" exhaust. Maybe I will end up going with a larger a/r.??? Come to think of it my t88 showed the same drop at top end. I am still running the Greddy manifold, I wonder if it could have anything to do with exhaust manifold design??

At what rpm are you guys that run the 1.32 t6 housing hitting 5, 600whp mark? Is there much differnce in my hp curve vs yours? Other than the power dropping off of course.

http://www.youtube.com/watch?v=qybuIv1op-s

Turbo manifold is not the issue.

There is a restriction somewhere, be it the engine porting, fuel flow, turbine wheel/housing, or intake manifold...

I have also seen this same curve style on other engine/turbos setups.. Only ones I haven't seen it on are engines with aftermarket intake manifolds and proper fuel pumps...

I am building several cars right now with over the top setups and I am bound and determined to figure out this issue once and for all. I hope to be in the 800rwhp range..

@ 13B-RX3

what exhaust housing was it please?

As you are using the 4 barel intake, no IC, no muffler, you are not limited by other factors I would say.

I would love to see that power band on my car, but it looks not possible to me as my car is street legal.

I do not like the Greddy manifold and there for I do not run one. Even I do not like the manifold, if yours is 60mm unit, you are OK IMHO.

That is the highest RPM based engine flow I have ever seen. Torque curve is still flat at 9000RPMS. What kind of port is that?

E&J Throttle body (4bbl)
JW intake
Semi peripheral port/large street port
T6 1.32 S475.

If you like that chart you should see the new one!

Well post the SOB up :egrin:

Interesting, that is very similiar to mine even with the t6 1.32 housing. :scratch: I am running twin bosh 044 pumps so I would not think it would be a fuel problem. Seems it may have something to do with intake mani setup or porting???


13B-RX3 thanks for sharing but shit man.... I sure do feel depressed now:(

Don't feel bad seven Like Iwan said, no intercooler, no muffler, intake TB ect.... This is purely a drag car.

I don't have the sheet on this computer Just Startin. I don't think most would believe it anyway :lol::lol::lol:

I think that main culprit is pretty obvious. Peak torque before 7k rpms and peak power almost immediately after with huge drop is, I would say, typical for REW intake manifold. Its just tuned for such rpms and even very free flowing hotside won´t change natural torque curve.

I will flag you before you even post ! :lol:

As long as its below 2000whp it shoudnt be a problem:bigthumb:

nice numbers with the s475, will join the club in 2012 .

I am running the t78 greedy manifold, with the "s400" t4 75mm turbo
1.25 ar ext housing. My power also drops off at about 7k rpm. I would have to say it's
The factory manifold. I've run a best time of 9.60@147 w/ 30 psi short track , and 35 psi top end tracK. This is also with no street porting on intake, jus a 2mm ex port
I'm at the end of the "stock" port venture I really wanted to run 9.20's but it's almost impossible with my race weight of 2870lbs, I guess it's time to go on a diet:scratch:
And get this bitch to run a number!!!! Lol