Has anyone heard any news on the exhaust cams for us REVUP guys? I know the intake fits but we also need the exhaust. The REVUP motor has been out for a few months now, and I think something should be in the works.

 

I can't talk about it...

 

Do you know anything I dont know about?

 

^^++1 !!!!

 

We have some customers who have put new Intake cams in only... have made some gains...

no exhaust cams out yet...

 

You think its worth it? All that labor for minor gains from intake cams? I know the REVUP motors utilitize the exhaust cam timing and thats why we make more power with mods. I just want to take advantage of the change. Let us know when a manufacturer comes out with revup cams, i'm sure you'll have a bunch of customers with cash in hand .

 

You state things like this all the time... Without any information to back up the claim... if your going to post somthing like this dont waste your/our time.

 

nissan motor sports has done this with their cams... we had a customer do it as well...

sorry I dont have dyno plots but it has been done...

 

Also, most of the people who are first to do things like this run their car in spec racing groups, and some of these modifications are not allowed per class spec's... so, most of the information is preferred by the owners not to be released...

etc.. etc..

 

I'm not sure why this is so difficult. Only a few companies make cams for 350z's (03-05), so now the REVUPS are out and we have nothing? Doesnt nismo make a engine package for the REVUP motor that has heads and cams?

 

its getting a cam blank for the exhaust timing that is the problem...

If you want to loose the exhaust timing and you can get the non-rev-up motor... With that exhaust timing you are already better off then having a non-revup with cams... hence the more power for the rev-up motors...

by adding the more aggressive intake cams, you basicly open up the motor even more...

Last I spoke to NISMO they were running the intake cams only on their Red NISMO R-Tune car that you see in the commercials...
As far as gains... nothing that I can claim yet, but there was certainly a gain...

 

So what would you estimate as to the hp gains?

 

my "GUESS"

12-14RWHP...

you know what... Im going to try to talk andy into doing intake cams on his Rev-UP 35th anniversay model... we have a base line...

oh by the way... here is reason to keep your Rev-UP plenums...

this is on a non-rev up motor... havent raised the rev-limiter on this car yet...

 

Doesnt andy have a MREV and dynoed at 296whp?

 

The dyno above is on a non-rev up 2005 car...

Andy has M-Rev on his car which we will remove if we do this... he dynoed 290/273 something like that..

 

I just got off the phone with JWT...

They are making the billet blanks are being made now for the REV-UP motor... Then they will begin testing on different grinds...

So, at this point now that it is "in the works"

I would wait for that...

 

Thanks a lot Jason, cant wait till its out.

 

yeah, im an idiot, why should this dyno convince me to keep the rev up plenum.
I already changed the damn thing, but if you give me a good enough reason, i will change it back

 

no torque loss that everyone is talking about...

from 4-6K that car is a monster... needs a higher rev limiter though...

 

Hi Jason,

Isn't this your pre/post dyno of the revup lower collector on your Z?



Honestly, it was your dyno of the revup collector on the 287 engine that tiped me off on putting the 287 collector with a spacer on the revup engine.
Your dyno plot above inadvertantly led me to figure out MREV before it was ever dynod on a REVUP engine!

What your dyno shows above is a loss of power just about everywhere exept the last few hundred RPM where it finally made ~10 HP. When I saw this, I had to ask myself, why did Nissan do this? IMO It did not look like a good trade.

A basic 5/16" spacer can easily make 10 HP or more and not lose TQ or area under the curve.

If a spacer on a 287 engine can make 10+ HP and not lose any TQ, it was reasonable to assume it would perform similarly on the REVUP engine if a 287 collector was used. IE somewhat similar top end and significantly improved TQ and area under the curve.

So when Andy dynod the MREV (287 collector/spacer) on his revup engine his results were quite remarkable... but also predictable. (See his plot below.)

You both pre/post dynod on the same machine and you both had similar deltas. If you extended your dyno plot out another 500 RPM it would be almost indestinguishable from Andys.
The only significant differences between yours and his are that his engine revs up to 7K and has he the variable exhaust cams. And it appears the variable exhaust cams with the MREV set up makes even more TQ and area under the curve than the 287 engine. Andys max MREV TQ is quite a bit higher than the 287 engine. This makes the MREV look like a very, very good mod for the REVUP.