Pwebbz28

iTrader: (31)

My stock crank, 374, L92 headed motor is hitting the engine dyno next week!

Heads went 395CFM @ .700 !!! Using a nicely ported GMPP carb intake and a hydraulic roller cam as well. Im not really sure about the cam except its 25x/26x on a 110 with a bit over .660 lift. Cam is from Bullet custom cams or something like that. Trying to spin this thing to 7500+ Alot of custom stuff was used for the valvetrain including one off T&D shaft mount rockers and Tit intake valves. If i hit 650+ at the flywheel on motor ill be happy. Looking for quite a bit more with the direct port.

s346k

iTrader: (4)

wow excellent setup. i'm very interested in the results as i've planned something VERY similar.

svtwhat?

iTrader: (17)

sounds like a KILLER setup man! i would like to see the numbers also.... almost makes me want to do a 6L based setup more and more

ExTurbo

any reason you stayed with hydrolic roller setup? I'd think a solid roller would more easily take the RPM's...just wondering sounds like a beastly setup either way!

ScottyRocket

What's the compression ratio? Static and DCR?

KONG

iTrader: (4)

Need more info!!!

Pwebbz28

iTrader: (31)

static comp is 11.75 and since these are custom lobes I'm not sure on the dynamic. I do know they are similar to an Lsk lobe but a bit more agressive. I wanted to keep this motor on pump gas and retain the knock sensors to some extent. This is going in a full weight Ta.

kistlerjm9

iTrader: (24)

686hp 611tq. lol could make it an even number but they never come out that way. nice setup. a little more info would be needed to give an accurate guess but that intake should make the lazy ports on the l92's scream at that rpm. low end is prolly gonna look like *** but hey thats why God invented gears.

Qwiknotch

Cam seems a little small for that much flow on the heads....
what did the exhaust flow?

Is this going to be f/i or carb?

I wouldn't expect that little 374 with make over 600tq. It should be in the 530 - 560tq
range. HP should click around 630-645hp
On nitrous, though, that thing should be a monster.

bandit1

iTrader: (12)

I think your gunna be shocked but I would guess around 590HP and 525 torque on the engine dyno considerably less at the rear wheels for that engine combo i think the cam is not right just my humble opinion I hope I am wrong. But hey if I am it will be a cool never know til its all tuned in and good.

FMFZAC

Nice head flow, with heads like that I would've gone with more cubes, just my .02. I would say 600-650 range as well. those heads on a 450+ci. LS motor would be a killer N/A combo.

ScottyRocket

I would have to agree with Bandit1's numbers and maybe a little less.... the heads flow enough to support this engine to 9500 rpm.

A lot of the power will be made up top, so depending on how high you are going to spin it....if only going to 7500 then 575-590maybe. Your dyno runs will probably show that with a late TQ peak and the Hp rising up until you let off at 7500....unless something restricts the system flow. I'm thinking the HP Peak should be around 7800 or abouts.

Who did your porting work on the L92 heads?

Pwebbz28

iTrader: (31)

motor will be injected but we are going to run it on the dyno with a carb. Then we will know what the motor likes when we tune it. I have quite a few pictures of the heads but I'll let the porter post them if he wants. Don't let the cam specs fool you. Its not an off the shelf lobe by any means. The closing speed of the intake valve is nuts.

Pwebbz28

iTrader: (31)

Guy named Chris Frank at RayMac in Ft Worth did the port work heads are beautiful. Now that i think about it he may have told me .680 lift

Qwiknotch

I still think the cam duration is too small...

What is the stroke and bore and rod length?

Pwebbz28

iTrader: (31)

4.065 bore, 6.125 rod, 3.622 stroke

supersub

iTrader: (25)

Lots of work put into that build.why the small cubes?big flow on the heads btw,how did the ex ports turn out compared to the massive in?planning on spinning 7500+ what valves did you decide would handle that?#'s are going to be hard to guess my thoughts good luck on the dyno.dont get shock and awwwed take vid of session (I forgot)LOL

Pwebbz28

iTrader: (31)

I think the ex port went 280. We are using Tit intake valves and sodium filled exhaust. The springs are about 200 closed and 700 open. Using a rev kit instead of the plastic lifter trays. Everyone is doing 400+ motors and i wanted something smaller thats just as fast. doing more with less is something that has always impressed me. One of the reasons i like the ford modular motors.

Qwiknotch

yeah, with that small stroke and long rod, don't expect huge torque numbers, but it should eclipse the 625+hp mark. I just think you need a cam with about 10 more degrees of duration on both sides.
With the cam you have, it still should make power until 7300-7500, torque will probably be in the 5300rpm range.

supersub

iTrader: (25)

intake and ex flow #'s are outstanding,largest by far WOWYour porter should become a s.vendor.My hats off to him!