ElusiveKandyDC

Anybody have good results using type-r cams with the greddy 18g turbo? I keep hearing different theorys on this subject mainly do to the small size of the greddy turbo. Any dyno comparisons or other real world experiences shared would be greatly appreciated. Thanks.



In case its relavant:

stock block GSR (10:1 cr)
portflow head
IB ported GSR intake manifold
greddy 18g turbo internal wg
greddy intercooler
2.5" exhaust from greddy cast elbow back

matt94z

I would suggest a 3" exhaust before you worry about cams.

blaze the chemi

The easiest way to increase power in that system is to get another DP. That is a serious restriction in the system and that alone will open a lot of potential. I know a few people on here have actually removed their A/C to have a bigger DP installed.

omiehomie

seriously ill give you an idea of how bad an exhaust opens up a turbo caR.

ex: my buddie just turbo charged his 93 miata with a greddy 15 g kit. it had the same 2.5 from the manifold back configuration for the cat. car ran like poo until he re-did downpipe and made a 3in exhaust. car is a night and day difference street and highway driving. power comes on much stronger for such a tiny turbo and the car has 130+ miles on it and is a 1.6 liteR. no joke!

Ryank327

^^^ Yep you are probably already hitting some backpressure, upgrading to ITR Cams will probably just make that worse.

ElusiveKandyDC

Thanks for all the responses. Based on the information given i wouldn't upgrade to type-r cams with my setup. Problem is... motor is assembled, tuned and has been running for a couple weeks now with type-r cams. The motor was assembled last minute with spare parts i had laying around and threw type-r cams in without doing any research first (boost noob here). I guess i'm just contemplating on switching back to gsr cams. Once again, thanks for all the help.

TheShodan

iTrader: (14)

You can keep them in there, just address the rest of the problem with the kit. Why do something twice.

MJobe

Type R cams would do well in your setup, But like said above the stock DP with the greddy kit is restrictive, and the 2.5 exhaust isnt helping you by any means.

EARLdaSQUIRREL

dp and exhaust/exhaust manifold are restricting it, but should be "ok"

rustydusty1717

The 2.5" exhaust is fine. I have the 18g, but I made a new dp that is 2.5" and it made a huge difference. Better power and the turbo spooled sooner. The 2.5 inch exhaust is perfectly fine though. No need to re-do your exhaust with 3" unless you're trying to max the 18g out. I'm at 320 whp with the 18g and 2.5" dp+ exhaust and it's perfectly fine.

93SI-GSR

GO BIG! 3" exh with no cat. Don't ever have to mess with the exhaust again unless changing out your muffler or putting your cat back on to smog. ...bigger downpipe for sure, larger injectors, fuel pump and management, mbc, dual stage boost controller...max that 18g out! Cams will do just fine and won't have to change out for smog. Port and polish your exhaust mani while your at it.

Dave_Dc2

my buddy had a very similar set-up...type r cams with stock everything else on an 18g boosting 7.8lbs and made 230whp

rustydusty1717

Why? Won't get much more than 350WHP out of an 18g and 2.5" is plenty for that. Why spend more money on exhaust when it's not needed? The 18g is a small turbo and 3" is just not needed. I wouldn't even do cams. I did some valve springs and retainers and head studs and even that isn't nessecary for low 300's. Port and polish manifold? You can't be serious....

Biggest problem with the 18g kit is the downpipe. I dunno if someone sells one for the 18g, but I fabricated one up myself and it made a huge improvement.

xander1100

if your taking things apart to upgrade the DP, the biggest problem is the elbow (its like what? 1.5 inch?) cant see the turbo having that much of a difference without replacing that. also heard that the flapper door on the greddy has problems fully opening, i know that some people ported them out a little bit so the flapper can fully open.

93SI-GSR

You may not need the 3" exhaust for the 18g, but it is all you need, and ready for a bigger turbo. And yes, I am serious, port and polish the greddy cast manifold...quicker spool and throttle response...may not be much, but enough to notice. Don't knock it til you try it.

rustydusty1717

Why upsize if he's not planning on getting a different turbo anytime soon, plus it sounds like he just got his exhaust done. Be a huge waste of money. I'm sure the port and polish works, but for how much it costs, it probabally isn't worth it. Or atleast could put that money elsewhere and get even more power. It's all about best bang for buck. Unless you have a tree that grows money.....

2s1owsi

With the Type-r cams I made 270 hp and 181 tq on b16a2 with 9.1 comp. at 12 psi. Hope this helps. Yeah, i also have a 2.5" catback exhaust with a 2.5" upgraded downpipe after the elbow.