Model of custom UIM
Why not have a smoother entry pattern into the runners of the UIM, instead of theat vertical wall before the runners? I am not sure..just guessing..but wouldn't it better to have a smooth non-trubulent flow into the runners? or it doesn't really matter since the air is pretty much gonna be stored there until the port opens so the pressurised air at the runnering will flow in and the air around follow after? either way.i still think it would be better to have smooth entry and exits to the plenum. What you all think?
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E85 Addict
Joined: Jun 2007
Posts: 519
Likes: 2
From: Stockholm
update! soon it is time to see some results (yes i did shorten the plenum a little bit)
First i will make some pulls with stock manifold/throttle body.
Fuel will be e85.
First i will make some pulls with stock manifold/throttle body.
Fuel will be e85.
Last edited by gusfd3s; Mar 10, 2008 at 06:48 AM.
Thread Starter
E85 Addict
Joined: Jun 2007
Posts: 519
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From: Stockholm
yesterday the car put down 448.8rwhp@7100 and 13.9psi on pump, the curve is still pointing straight up so there is still more to find.
Now i've changed wastegate spring and maybe we can get it boosting some more.
Now i've changed wastegate spring and maybe we can get it boosting some more.
Thread Starter
E85 Addict
Joined: Jun 2007
Posts: 519
Likes: 2
From: Stockholm
Thanks guys,
It is a greddy t78 turbo. Havn't tried the stock manifold yet, but from an earlier dyno with exact same motor/turbo setup it made 379rwhp on 15psi, pretty untuned though.
New thread in the single turbo forums with a new dyno run at 17.4psi!
It is a greddy t78 turbo. Havn't tried the stock manifold yet, but from an earlier dyno with exact same motor/turbo setup it made 379rwhp on 15psi, pretty untuned though.
New thread in the single turbo forums with a new dyno run at 17.4psi!
Thread Starter
E85 Addict
Joined: Jun 2007
Posts: 519
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From: Stockholm
new post in single turbo: https://www.rx7club.com/single-turbo-rx-7s-23/t78-dyno-inside-499rwhp-17-4psi-753201/
Last edited by gusfd3s; May 3, 2008 at 10:23 AM.
Rotary Freak
Joined: Dec 2001
Posts: 2,402
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From: chandler, AZ
Why upgrade to single turbo when you can achive 350-400hp with twins? why port the engine for better flow? people have made over500rwhp on a stock engine.
It is all about reliability, to achive highest hp with as low boost as possible. even if i only get 3-5% better flow with this manifold its still better than stock, 5% on a 600hp car is 30hp, why boost 1.5-2psi more to achive the same power?
This is my hobby, i love my car and i don't see it as "trouble i have to go through", its fun to create something. Since im doing all the work myself its only my time i invest.
It is all about reliability, to achive highest hp with as low boost as possible. even if i only get 3-5% better flow with this manifold its still better than stock, 5% on a 600hp car is 30hp, why boost 1.5-2psi more to achive the same power?
This is my hobby, i love my car and i don't see it as "trouble i have to go through", its fun to create something. Since im doing all the work myself its only my time i invest.
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