GT40R Project....
Awesome, I have a 40R project that should be finished up at the end of August when Ray Wilson at PFSupercars will be tuning it. Let us all know what kind of power it makes. Good luck
Dee
Dee
Originally Posted by mr2foryou
Awesome, I have a 40R project that should be finished up at the end of August when Ray Wilson at PFSupercars will be tuning it. Let us all know what kind of power it makes. Good luck
Dee
Dee
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Originally Posted by mr2.2liter
looking good bro. At what point would it be worth while to modify the stock intake manifold to a 4" tb? Has anyone ever done that?
I would try and keep it at ~70-80mm. If you insist on a large TB, your best bet is to go with a large ITB setup. This way you can set up the primary TB's start opening before the secondaries. 
On a side note, there's really no need to upgrade to a large single TB. At most, I would enlarge each of the TB openings, and replace the butterfly valves with larger ones. You can also do some polishing work to the TB. If you take a moment out to do a search, you'll come across alot of people that have polished the TB. They typically take the bridge that seperates the 3 butterfly valves, and smooth it all out. It just helps direct the air to each of the butterfly valves with less turbulence.
-Alex
Last edited by TT_Rex_7; Jul 31, 2006 at 03:26 AM.
I see your point and understand it. This is what I am looking at here. Our customer has a street port motor. He is bringing it to us to make him a custom ic. We are looking at something wide like 34x12x3. I have heard you want to keep the ic core thin as to keep enough flow for the radiator. We were debating running 4" piping from the tb to the ic, but if you guys are saying to stay with a smaller Tb, then looks like we will go with 3" piping and a 75mm tb. Also we will be making a full 4" exhaust system on this car. By his wishes we will also be making his a new intake manifold. I will post pics as project comes around. Any input will be appreciated
Originally Posted by mr2.2liter
I see your point and understand it. This is what I am looking at here. Our customer has a street port motor. He is bringing it to us to make him a custom ic. We are looking at something wide like 34x12x3. I have heard you want to keep the ic core thin as to keep enough flow for the radiator. We were debating running 4" piping from the tb to the ic, but if you guys are saying to stay with a smaller Tb, then looks like we will go with 3" piping and a 75mm tb. Also we will be making a full 4" exhaust system on this car. By his wishes we will also be making his a new intake manifold. I will post pics as project comes around. Any input will be appreciated
As for the intercooler piping, I would probably keep it at ~2.75". This is also the stock intercooler piping size, which is quite large for the power the FD made stock. I spoke with bell intercoolers about intercooler piping, and they told me 2.5" intercooler piping would be fine, and 2.75" would give some room to grow, without loosing much responce time from the turbo. If this guy is looking for something like 550-600rwhp, then I'd go ahead with 3" intercooler piping. However, I don't think the GT40R will even make that kind of power on a 13B. If I remember correctly, my GT40R has something along the lines of a 2-2.5" outlet on the compressor, so keep that in mind as well.
As for the TB, again, I probably wouldn't bother upgrading the TB. I'm not sure what your exact plan is, but adding a single TB to the UIM on the FD would require a plenum. To add a plenum, you'd have to cut the UIM at the point right before the primary runners radius down. If you simply try and make an adapter plate, and bolt a TB to the factory UIM, you'll actually loose power. The air would just smack into the walls of the UIM where it bolts to the factory TB. I'd worry more about the LIM, and either fabricate one, or run the GZ LIM.

I would simply pick up a Greddy elbow, and run 2.75" intercooler piping.
I don't want to go any more off topic here, so your more than welcome to shoot me a PM about the TB and things. I have a bit of experience with machining intake manifolds for the 13B and 20B.
-Alex
Edit: Just noticed the part about the customer wanting a custom intake manifold, so forget about the whole cutting the factory UIM part and so on!
Last edited by TT_Rex_7; Jul 31, 2006 at 04:20 AM.
SO far we are looking at something like a T74 Q trim. He is hoping for high 600whp. We will most likely be removing the bumper support to go with the larger core. As I said once the car goes under the hammer we will have all the specifics. Also he has told us he will be bringing us a "new" style lower intake manifold that allows him to run a single fuel rail. We will be making a custom intake manifold using the stock upper.
Originally Posted by mr2foryou
I plan on making 500-550rwhp on my 13B with my GT40R. We'll just have to wait and see. I believe it is very possible.
Dee
Dee
I think the GT40R can flow enough for ~700fwhp on a piston engine. So lets say 15% drivetrain loss, your at ~595rwhp. It'll make even less on a rotary, so I'd say between 500-550rwhp would be about the max.
-Alex
Last edited by TT_Rex_7; Aug 1, 2006 at 09:45 PM.
Originally Posted by mr2foryou
SilvioRX7: Do you have any pics of your turbo kit setup?
Dee
Dee
Thats what I am shooting for on my 40r setup. I made 430 on my old stockport motor at 19psi. and not fine tuned! I hope with a good port that I now have and 25-27psi I can break 500!
oh that's nice
That's a bit more hardcore then mine, but I'm just running the two Supra pumps in the tank. It's looking really bad *** Silvio. I want to come down there when your **** is running.
That's a bit more hardcore then mine, but I'm just running the two Supra pumps in the tank. It's looking really bad *** Silvio. I want to come down there when your **** is running.






Good luck with the project!



