kazdevil

I cant agree more with what Mike said. The boost gauge this time was reading 20~ psi before even it hit the rev limit-at the IC inlet-. while the outlet boost is 15 psi just before it hits the rev limit.

stevieturbo

You must have some seriously **** intercooler ?


Although it also raises the question....just how different is a solid roller profile compared to a hydraulic ?

slow67

iTrader: (2)

Don't forget solid rollers generally have more area under the curve, so they many times will make similar power with less .050 duration.

kazdevil

Hyd cam: 248/254 .601/0.621 114

Solid cam: 236/247 .632/.668 114 (+4)

stevieturbo

on paper the stats dont look much different...but what do the graphs for are under the curve actually look like for each cam

Grr

iTrader: (2)

definately intercooler. Look into going front mount, i had around .5psi of pressure loss on my ebay frontmount at 12psi, couldnt tell exactly but it was in the .5 area by watching the guage. You will like that 8" pulley, heres what i did:
forged 355 9.4:1
STOCK heads, not a drop of modification
918 springs with Ti retainers
1.54:1 pro magnums
ported LT1 intake
stock throttle body
pacesetter headers, dual 3" exhaust
basically had the cam lloyd elliot mentioned, 226/232 .590/.600 114lsa 110Icl if i recall
YSi
FMIC
T56 mcleod twin, 9" rear

I only had it on the dyno one time, that was before i made the pulley setup. It made 11psi boost at the intake, A/F was in the 10.0 area and 14* timing on pump gas. I was using the stock Ecm in 2-bar and was way the hell off on my baseline. It threw the belt after 3 pulls when i finally got the AFRs to register at 10.0 (it was in the 9s to start) and i had to go home.
It made 522whp/478wtq on a mustang in that configuration, picking up 40whp every pull as i figured out the tune.
Later I fixed some issues and put a new belt on, with the crappy air inlet off and it made 20psi, so that was also a big restriction

I made a bunch of changes that winter switching to 10-rib with a manual tensioner and it was making roughly 675whp with the same stock heads just getting the blower setup to actually work doing 15psi and running 11.5afr at 24* timing

Beaflag VonRathburg

iTrader: (176)

With the lash the solid is a smaller cam. I think the cam was ground with his operating range in mind. I don't think it would turn too much more RPM.

stevieturbo

Also raises the question....would a solid roller be worthwhile for an LSx ? Especially if you wanted to run a good 7krpm often ?

Beaflag VonRathburg

iTrader: (176)

I am putting together a stock L92 bottom end with a set of TFS 225s and 2'' kooks headers. The heads are setup for crane polymatrix adjustable rockers. Patrick G was helping me with my setup until I got derailed by money issues and sponsors providing me with the wrong parts, but... He mentioned that with already having the parts for the solid roller setup it would be a no brainer. He mentioned a tight lash setup for drivability.

I think in more of an extreme combo turning lots of RPMs it would depend on if your oiling system is up to the task. LTLHOMER used to have Harlan's old twin PT66 kit. It was a 347, ported stock 241 heads, and a solid roller setup that blew at 8200rpms. It ran 8.78 at 21psi and this was 2006.

I think with the advances we've had in engine and tuning technology a solid roller in a setup like that starts to lose some merit. Don't get me wrong as I think it has it's places, but Mark Koehler ran 7.4- on a hydraulic setup. He is now going to a solid setup, but I think it depends on your car and preferances. With the monster ramp rates on cams and accelerated rate rockers out there now you can get the same kind of aggressive lobes if not exceed them with a hydraulic roller.

kazdevil

This dyno run done with 8'' crank, KNN filter #RC-5171,meth injection, no intercooler.Still waiting for the cog setup from RMCR.

white01ss

iTrader: (37)

How were the IATs with only meth?

kazdevil

with meth ,IAT was 35 deg c. I had the 375 ml/min jet fitted if i remember correctly.

white01ss

iTrader: (37)

95 F is really good for no intercooler and meth only. Did you try a dyno without filter?

Makes me want to bypass my twin intercoolers and do a meth only test. Getting IATs below ambient currently, but probably losing boost from all the restriction.