is that coffin manifold a custom? i couldnt find it on their webpage? any dynos?

 

I was joking about selling it (I wouldn't give it away), because it is crap just like the kinetix SSV. Tim quit selling it I guess (was $1000.00 new), now he is working on a new version (the one on the web site).

 

the coffin one sucks
The SSV felt like it gave me more NA power which is more than I can say for the Crawfor V4 I had before. No don't have dynos, but I did a big write up somewhere in a thread

 

gotcha

 

The coffin one isn't set up correctly for good airflow throughout the whole manifold. The middle cylinders would get more air then the outside ones. Tims new manifold looks promising but its too complexfor proper fitting of some kits

 

Would this really make that big a difference ? I mean, there's still enough difference between the blue and green curve at 6.5K RPM. And if you look at the measuring line just after 6.5K (guessing that must be stock redline) it reads 337.6 (?) vs 378.2.

Anyway, I will have mine installed this week and I have a dyno chart of 330 RWHP before. Big problem tho is that with the SSV install, I'm also having JWT CAMs installed and Big Brakes (AP Racng 4 pistons at the rear). Anyone know how that will affect the after performance so we can deduct those gains (add losses?) ?
I also have the Cryo2 kit on my car now, but I guess I can just leave that off for the dyno run.

Thanks,

Danny

 

Take a good look at our lower stock plenum. Those slits that take air to the cylinders can't be efficient. And the space before the "runners" (can I call them like that) is just ridiculous. That's basically my beef against the spacers and top-half replacement plenums, they don't improve that part of the plenum. No wonder Nissan made significant changes to the lower plenum on the new RevUp engine.

 

Why not install the SSV on the dyno, and do it Its farrrr easier than the cam install. I did myown in like 3 hrs..alone.

 

Because my SSV is on a plane from Miami to Panama and my car is in the shop with it's hat off and the big brakes already installed...

 

No Dyno numbers yet. It will be kind of hard to compare them because I had JWT cams, 9psi ATI Procharger pulleys and an AP Racing BBK installed at the same time. Maybe somebody can tell me how much to add for the cams and the 9psi and how much to subtract for the AP Racing 14"+ disks ?

FIRST IMPRESSIONS (without tuning). Without running the car in the high revs where the added boost kicks in and benefit of the cams start, the car now bogs down. It shows a definite lack of fuel, EGT goes up higher than normal and the Wideband AFR shows the motor running lean. This must mean (IMO, feel free to correct me) that a lot more air is entering the engine mostly thanks to the plenum. If that is true, then the plenum must add a sizeable amount of HP to my setup.

Well, hope to get my car on the dyno on Monday (tomorrow) and I'll post some after numbers. I was at 330RWHP before the mods.

 

I have a APS TT car, and had this plenum put on during install, the car lost alot of power over the stock plenum, even after retuning and upping the boost slightly, it would not make the same as the stock plenum. I dont have the dyno charts, but this is not BS. And yes, the tuner does know what he's doing. Have the APS plenum now, and making very good numbers.
Seems to work best with the supercharged crowd for some reason.

Looks gorgeous though!

 

I just installed the SSV and I did a before dyno. I'll post the results when I get my after dyno on Saturday.

 

Yeah, can't beat it for looks. But if it takes HP away, it'll be on eBay as fast as I can get another plenum...

Danny

 

365 RWHP and 300Lbs-ft Torque up from 330 RWHP. Added 1.5 lbs of boost and cams to my stock internals block.

Those giant HP gain claims are not real. Maybe this plenum makes 5-10 HP over the plastics Kinetix V4 one in my setup (see sig).

Things I did notice: the power band moved up in it's entirety. The car breaths definitely better. Surprisingly, although the boost is higher, EGT is lower.

I definiely need to get a better Stand Alone tuning computer. I'm sure I can get like at least 20-30 HP more out of my setup. It's just not possible to fine-tune my setup enough with the ATI FMU.

I also had a very long chat with my mechanic about plenums and such. He has built an 11.0 sec car from an old Corolla 4 cylinder (this would run 10 or lower in the US) and did all the mods on my car so I guess he knows what he's talking about. He basivcally told me that we can do what we want to our plenums, but at some point it will not improve anymore. Once the plenum is 100% efficient/big enough/flows enough/etc (*)... the real bottleneck is below the plenum. The valves and the intake ports are still restricting airflow so you would need to port the intake ports, go for a bit bigger valves. Would be nice to know if something like this was done to the car with that enormous HP gain...

Same goes for the exhaust BTW. At a certain level you can't get a better exhaust. Porting and polishing the exit ports would help most efter market exhausts.

BTW: talking about ehausts, my Invidia G200 + resonated test pipes + Ceramic DC sport headers was SO loud during the dyno run that at higher revs and standing next to the car, you could not not cover your ears. A few meters away, you could not talk on the cell phone... OUCH !

Danny


(*) work with me here. I'm not saying the SSV is 100% perfect. I;m trying to say that once a certain plenum can't flow more air any faster than the head/vales can take in, it could be called 100% effective at that moment.

 

that makes perfect sense to me. The plenum can only be as efficient as the motor and its mods. If the motor is stock then dont expect great things from changing from one plenum to the other.

 

I tried to interpret the results but I am not sure if my thought are correct:

If the new plenum added boost it doesn't flow as mutch as the previosly installed one (remember where the boost is measured at). Consequently less air is entering resulting in a richer A/F ratio which again lowers EGT.

On the other hand... the new intake might be less restrictive then the old one allowing the turbine to work easier (less vaccum on the suction side) thous the higher boost. But how did the EGT go lower then? Maybe the FMU is a raising rate one and has added exponentialy more fuel causing the A/F ration to become richer?

 

Sorry, wasn't very clear there. I changed the 7psi pulleys for 9psi pulleys, I'm getting a max. boost of 8.5psi, so I guess my engine flows very freely (or the pulleys are not very accurate LOL)

The drop in EGT was seen before changing the tuning and stayed lower after the tuning. Kind of has me baffled too.

Danny

 

How much would it cost to port and polish?

 

Getting a quote from two very good shops in Florida and Puerto Rico. My quote will also includes bigger intake valves. Will post here once I get them in.

Danny

 

Z1motorsport has some build heads (and blocks) for the Z