fonts Posted October 3, 2009 Share Posted October 3, 2009 I'm running PNP exhaust manifolds, COP and UP all from Grimmspeed. I did wrap the COP. No issues at all with noise or ticking. Great product. Very happy with the results. Link to comment Share on other sites More sharing options...
Mindspin311 Posted October 6, 2009 Share Posted October 6, 2009 Ok, so has anyone gotten dyno numbers to compare stock vs GS parts? Im currently at stage 2, UP, DP, Perrin TMIC. But Im thinking of adding the Pnp manifolds and v2 COP. I was hoping to find some real world numbers as to what gains to expect. Link to comment Share on other sites More sharing options...
scoobydoobie Posted October 6, 2009 Share Posted October 6, 2009 search this subforum for a post by grimmspeed containing that info. Too lazy to search for ya at the moment Link to comment Share on other sites More sharing options...
Mindspin311 Posted October 6, 2009 Share Posted October 6, 2009 search this subforum for a post by grimmspeed containing that info. Too lazy to search for ya at the moment I saw the post about the crossover. But I havent found anything about the crossover and the ported manifolds together. That is what Im wondering about. Link to comment Share on other sites More sharing options...
snow05gtRI Posted October 6, 2009 Share Posted October 6, 2009 you're probably not going to get huge gains. probably widen the curve a little bit, adding some down low and a little more up top. Link to comment Share on other sites More sharing options...
DHL1010 Posted October 7, 2009 Share Posted October 7, 2009 Do I need to tune my car after installing the Grimmspeed PNP exhaust manifolds and COP?? Thought of tuning it together with my new VF52 in the later part.... Link to comment Share on other sites More sharing options...
rubberman Posted October 8, 2009 Author Share Posted October 8, 2009 Do I need to tune my car after installing the Grimmspeed PNP exhaust manifolds and COP?? Thought of tuning it together with my new VF52 in the later part.... You don't need to have a tune to install the parts, but if you want to take max advantage of them you will need a tune. Link to comment Share on other sites More sharing options...
DHL1010 Posted October 8, 2009 Share Posted October 8, 2009 You don't need to have a tune to install the parts, but if you want to take max advantage of them you will need a tune. thanks. Link to comment Share on other sites More sharing options...
DHL1010 Posted October 29, 2009 Share Posted October 29, 2009 Got the Grimmspeed PNP exhaust manifolds and COP. Installed with all the original casings (half casing on the COP), no issue at all. No sound. Great product.... faster spool up with my VF52 turbo from IIR. Link to comment Share on other sites More sharing options...
GrimmSpeed Posted October 29, 2009 Share Posted October 29, 2009 Thanks for the input! We're glad you like everything Mike Link to comment Share on other sites More sharing options...
Bolksey85 Posted January 7, 2010 Share Posted January 7, 2010 Can anyone verify if manifolds are the same from 2005-09? Thinking of buying used manifolds then sending them out for PPC work. Link to comment Share on other sites More sharing options...
GrimmSpeed Posted January 9, 2010 Share Posted January 9, 2010 Can anyone verify if manifolds are the same from 2005-09? Thinking of buying used manifolds then sending them out for PPC work. Yeah the exhaust manifolds are all the same. Justin Link to comment Share on other sites More sharing options...
SSpeed Posted October 23, 2010 Share Posted October 23, 2010 Weird.... I have the same noise... I debated trying to make the stock heat shields work, along with the wrap, but now I suspect it's the flex section since others have had that... I had a fitment problem with my first Grimmspeed crossover, about 1/2" too short and I could hear the flex section cracking as I tightened it up,, the flange had to physically bend to line up, major leaks. So they sent me a new one which fits much better and has no flange leaks at idle.... With the new pipe on, as I slowly roll on to the throttle, I hear what I thought could be described as a VW bus noise until I saw the cricket on crack, that's it exactly... kind of like ticking, but not really... At WOT it's gone, but rolling on the throttle it's noticeable, my pipe is wrapped. I didn't hear this on the stock pipe, and I don't hear any difference at idle, it's just when rolling on to throttle... the crossover pipe was the only change, I used the GS double thick gaskets.. I put both sides on loosely and the incrementally tightened each so it was uniform. At idle I had no exhaust leaks... With the stock pipe I don't get this cricket on crack/VW bus noise... My car has the stock cans on 3in downpipe so it's pretty quiet, this cricket noise is horrific... Damn it I want the GS pipe since I ported my manifolds, but the wrong fitting one and now this cricket noise is bumming me out... One thing though, GS customer service has been awesome to this point... Link to comment Share on other sites More sharing options...
scoobydoobie Posted October 24, 2010 Share Posted October 24, 2010 I've just learned to live with the tick. The increase in response and flow is probably worth the sewing machine sound. Just get a louder catback and you won't notice it Link to comment Share on other sites More sharing options...
SSpeed Posted October 24, 2010 Share Posted October 24, 2010 After reading all 9 pages of the NASIOC thread on this I pulled it all apart again last night and then disassembled my old crossover pipe heatshield and "modified" it to work on the Grimmspeed pipe. I still hear the VW bug/cricket on crack, but it's definitely more muffled now. I can live with it at this level for how responsive it is. Link to comment Share on other sites More sharing options...
GrimmSpeed Posted April 19, 2011 Share Posted April 19, 2011 Hey guys, we've been extremely busy in the Porting/Coating department lately so turnaround time is going to be 2+ weeks at the moment for any new orders. We are busting them out as fast as we can. Justin Grimm Link to comment Share on other sites More sharing options...
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