HAMSTERHONDA

wow, great job!!

Garrett

it could be nice to see this setup test with a 68 mm+ TB, an open header

how is the back pressure? are you logging the back pressure?

koczeka

Nice!
I doubt the runner entries are optimal on that IM, could be better...
Rev it more. :D
Dyno with closed hood...

717thriller

Damn, great numbers! I like the fact that you kept the AC and PS and made great power, everyone dogs me when they see it on my b20 setup. Now I can direct those who say it robs alot of hp to this forum.

BearsEK-KMSU

Pm please.

BearsEK-KMSU

Pretty sure the open hood is just as good as driving down the road at 50 mph. We cannot reproduce the air over the car on the dyno.

tasco

im not sure what kind of racing this engine was built for but have you guys played with the intake length any? it really short in the pictures.

BearsEK-KMSU

Yes we have played with it. It was 2.5" longer than the one in the picture. It was built for road racing.

Alot of things could be better if $ wasn't a factor.

Here is the graph on a hot run revving it a bit more.

koczeka

THX, lol
Now its clear, it does not really worth to rev more since it is not flat or climbing. I would put the limiter ~9250.

touchmyHONDA

nice job

BearsEK-KMSU

Here is a back to back test Pro 3's vs P3 Intake cam vs Pro 2 exhaust cam.

pgpbubble

amazing...

Furyof4

Awesome! What made you want to try that combo?

BearsEK-KMSU

He have had good luck in the past trying the smaller exhaust cam. Customer was willing to try anything else. Exhaust cam is big on a Pro 3....

Furyof4

Very cool, thank you for posting.

koczeka

what is amazing is TQ starting to fall @8.5K (despite the relatively small header, IM and not too huge cams)... it is generally 1K lower on 89mm stroke Bs

BearsEK-KMSU

The Header is smaller but it is half the length as other customs.

Mr. smith

nice numbers

Big Phat R

Crazy compression ratio! Race gas only I assume....

Amazing

DDTECH

May i ask why you think the pro3 exhaust cam is smaller.. I notice through alot of research i've been doing on rockets stuff, that the m24xx's and the m25x's have tended to have a smaller exhaust cam so you and him were on to something.

But i wanted to hear your logic behind it..

Charlie Moua

iTrader: (3)

83.5mm..... sleeved motor?

if sleeved, why didn't you just go 84mm?

johnson8861

I bet it screams at the top.

Natural Aspirations

I believe he used the pro2 exhaust cam and stated it was smaller than the pro3.

I remember speaking with DonF when I was building my GSR and he steered me away from the rocket cams due to the exhaust cams being larger than optimal. His cams were mostly symmetrical intake and exhaust on lift and durration where almost any other cams I've seen on along with OEM are larger on the intake side. I assume he designed his cams thievery for simplicity and cost effectiveness.

ShaunRR

Actually, I believe Rocket stated that was a design philosophy followed by Ed Iskenderian of Isky Racing cams. IIRC, he believed it improved top-end power. With the relatively low volumes he dealt with, I don't think the strategy would actually save any money.