OK, so basically im doing research to prep for my turbo build. I've seen a few options and i was wondering if anyone has any thought's on the GREDDY Turbo Kit with the Mazmaniac Turbo Upgrade and CobbAP. Any thoughts, recommendations ??

 

Its nice but the greddy manifold isn't the best. Its restrictive and contributes to high exhaust port temps, warping, associated issues etc.

Rx8performance low mount set up is superior imo, but that's up to you to research who that is.

You get what you pay for. MM turbo upgrade is solid though - that's the turbo greddy should have come with as the t618z (someone correct me if I am wrong) is so far outside of efficiency if you use all 6 ports that its not even funny.

If you are running thr t04b compressor cover I'd upgrade the intake pipe to the turbo to match the diameter of the inlet to get the most benefit.

Also search, the greddy turbo set-up is the most common and has the most coverage.

 

It's funny because I have been looking to get my Greddy manifold remade in a tubular setup and all but one of the manifold fabricators I talked to have said that the design of the Greddy manifold is very good and could not really be improved upon. I always thought that myself since it is a simple and straight forward design. And both of the big name guys I have talked to that stated this build uber expensive turbo manifolds turbo drag cars so I trust their judgement. I will probably have them do it just because the Greddy manifolds are getting rare but I don't expect an improvement in performance from it.

 

Not sure what you are saying ... good or crude?

Its more of a heat issue imo. Also a different manifold allows you to run something with a different (larger) inlet footprint that should reduce backpressure and relieve heat

 

I'm really surprised that MM is still offering this turbo upgrade .Not because it isn't a great thing . I thought he would have dropped the idea because of all the issues it caused him and those that got burnt.

As far as upgrades go though , I think MM really got it right with this one . The 3071 with a 76 wheel in it (still unconfirmed ) is one of the best turbo solutions for the Renesis. For peak power the Greddy/BNR 60-1 upgrade is superior and the compressor is a better match for the engine characteristics ........ but the Garrett is a better turbo than the Greddy in most other respects.

As for the greddy manifold ... I have always thought it was a good design (flow wise ) and going tubular was never going to be a major upgrade .

 

Not a major upgrade I agree, heck it may even negatively affect spool. I am thinking more in terms of reliability/longevity

 

Yeah the Greddy casting almost always cracks in a few places which is a major PIA . Not sure how much longer a home made tubular manifold would last though . Seems those that have gone that way have heaps of issues as well .................

 

Maybe more so in terms of engine heat soak?

Also what's your opinion of the gtx 76 wheel compared to bnr

 

The GTX3076 would be the ultimate IMO .... but have a look at the intake on that turbo ..... it's 4" and you can't go smaller ................. so not an option for a low mount.

 

I have heard things here and there about people getting burnt from MM. Or getting such a basic tune that the 8 ran shitty. thats why i started this thread. I want everyones opinion not just on the parts, but on the seller of the parts as well. Im not even going to prepare to do business with someone who's shady. So manifold issue's and some people have gotten burnt is what i've gotten out this so far.

 

or you started it because
Fools Day?

 

NO WCS haha i really started it to get 8 members opinions on it. haha

 

So you want opinions on MM ? .................... well ................ I could write a book on that one !

 

Yeah sorry for misprint, I meant that they stated that the Greddy design is good. However, in researching a fix for mine, I have found that they crack pretty often and repairs on them are hit or miss because many do not repair cast.

I also agree with Brettus in that a tubular probably would not last much longer in most cases.

 

The Greddy manifolds on S2K's are cracking as well, but there is a company that makes a Greddy replacement for them.PFABRICATIONS - PFAB Greddy Replacement manifold

 

Great info, thanks.

 

Only if you drive/mod an S2k ....

 

Can the manifolds be ceramic coated internally to keep the heat down?

 

just wondering, has anyone done a similar turbo to the mm upgrade?

 

Hmmmmm ...............good question .

 

 

I'm loving my 57 trim upgrade, but always open to improvements. 316whp @ 9 psi sounds sweeeet! btw if money was no option, is there anything that could make the renesis bulletproof?


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What, am I reading this right? Jeff still offers his upgrade kit??

 

I have no idea .... It is still advertised