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RX7Club.com - Mazda RX7 Forum (https://www.rx7club.com/)
-   Single Turbo RX-7's (https://www.rx7club.com/single-turbo-rx-7s-23/)
-   -   IWG vs EWG on Borg Warner EFR turbos (https://www.rx7club.com/single-turbo-rx-7s-23/iwg-vs-ewg-borg-warner-efr-turbos-1091150/)

Glease Man 10-31-15 07:36 AM
RHD chassis are no problem, we just did a 9180 with a 4" DP with miles to spare. Even with an xcessive Intake.

Both ways, Meth is a really good idea.

WANKfactor 10-31-15 06:13 PM
Thanks Gleaseman. its a Fb though - steering box, brake master, and bugger-all clearance to radiator.
i'm now thinking 8374 again. but 0.95 iwg or 1.05 ewg? On one hand the .95 will possibly spool better, but the 1.05 will require a lot less work when fitted to existing twin gate manifold, which has proven itself to have rock solid boost control.
Im going mad trying to decide!

eplusz 11-01-15 04:18 AM
Originally Posted by mannykiller (Post 11984452)
^Except there's another factor to take into consideration... The fact that the EWG comes with a larger A/R....which the IWG does not. So your are right regarding internal vs external not affecting spool...but the size of the housing will have an impact as well as the mani=-)
This is exactly the problem/ thing that i'm doubting now.. i'm on stockports and am closing a deal on a EFR 8374 EWG and 1.05 housing. But worried about how my stockport engine is going to spool that big boy even though the manifold is very well made (48mm runners, equal length etc) but still.. :scratch:

Can't really find data of someone with stockports and on pump using that same turbo, so a bit worried about performance.

Ian_D 11-01-15 01:59 PM
Originally Posted by WANKfactor (Post 11986338)
Im going mad trying to decide!
Phew, I'm not alone. I had the wastegates but no manifold and it was close thing which would come first: madness or a decision.

Tuning4life 11-02-15 10:38 AM
Originally Posted by eplusz (Post 11986444)
This is exactly the problem/ thing that i'm doubting now.. i'm on stockports and am closing a deal on a EFR 8374 EWG and 1.05 housing. But worried about how my stockport engine is going to spool that big boy even though the manifold is very well made (48mm runners, equal length etc) but still.. :scratch:

Can't really find data of someone with stockports and on pump using that same turbo, so a bit worried about performance.

I don't think you will have a problem spooling an 8374 on stock ports, in fact if you had HUGE ports I would think it would spool worse than stock ports.

EFR8374 is a great turbo for these cars...no excellent.

WANKfactor 11-02-15 01:47 PM
Originally Posted by Ian_D (Post 11986602)
Phew, I'm not alone. I had the wastegates but no manifold and it was close thing which would come first: madness or a decision.
Yeah, my decision was finally made easy when i got under the car yesterday to take measurements, noticed egr probes had come loose again and how fucking hard they are to get at with plumb back twin wastegates. Priced out some sch40 and flanges relatively cheap and nek minute I've put money down on an IWG 8374 with a well respected member on here!

FD7KiD 12-23-18 06:40 PM
any updates???

Turblown 12-26-18 06:21 PM
Originally Posted by FD7KiD (Post 12320850)
any updates???
To what exactly ?

Aramir 05-24-19 07:38 PM
Anyone care to chime in on the response difference of the .92 ar of the iwg vs 1.05 ar of the ewg for the 8374? I already have a ewg manifold and wastegate but im worried the 1.05 might not be responsive enough. It will be on a stock port fd and ideally be making boost sub 3500 rpm


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