Speedracer2j

iTrader: (8)

Well, the results of my dyno tune are in. 414rwhp, and 383ft lbs. Seems low for a solid roller, but being this motor is setup to run a pretty big shot, has a nitrous cam, I am very satisfied. This also was with full exhaust, and the car is still running an a/c system. This is n/a numbers, it went on speed inc's dyno last saturday. This summer I will be running a 200hp shot, through a Nitrous Outlet plate setup. We should then see some BIG numbers. Im hoping to put down close to 650 on the spray.



http://www.youtube.com/watch?v=bfkDjZLNkRk

http://www.youtube.com/watch?v=ZfmRPlzmJ4I

Elliott's94Z

iTrader: (12)

Very nice man! I'm going to run their 100 shot plate set up soon too. Again, nice number and good luck with your future nitrous build.

2XR95Z28

iTrader: (4)

Was a good day for your car man, she sounded sick in person on the dyno! Now i just need to get mine figured out haha! Congrats though man

strokin93z

iTrader: (1)

Great numbers, i cant wait to see the graph with a 200 punch! make sure to make video of the nitrous hit too! Good Luck!

RamAir95TA

iTrader: (2)

Maybe it's just me, but I would think with a cam of that size (whether it's a nitrous grind or not) on a solid roller setup, would make power past 6000 rpm.

xx_ED_xx

iTrader: (17)

It is all in the combo of parts.

wrd1972

iTrader: (12)

IMHO there is a problem with that big a cam peaking at 6.1K RPM. But the numbers for NA are great. WTF is going on there.

That torque curve looks identical to mine with a small 224/230 cam right down to the small hole in the middle.

94Z28rag

iTrader: (10)

I'm going to have to agree here. Something is off.

LS1 SPEED

iTrader: (22)

The car was not missing on the dyno and this can be seen by a smooth graph as well. This is just the sound being picked up by the camera.

I do agree it made less power then expected, but then again a dyno doesn't make a car fast. The car had full exhaust, 9" with 4.10's etc which can take away from things some.

peak power is a little early, but again it does not drop off drastically as if an issue with valve float or anything

cam could be installed wrong, ground wrong, but more so it could be a restriction in the heads, intake etc

Jason knows there are some things he can address and tweak the combo, but he has a solid foundation IMO to work with and he is happy.

SS RRR

iTrader: (2)

That is a pretty small cam for a SR, but nonetheless I would think it would peak closer to the 7K range...
There is a lot of smoke billowing out on that 2nd run. Do you know the cause? If not, I would suggest looking into it.

LS1 SPEED

iTrader: (22)

yes..it seemed to be pulling oil in from somewhere

pcv or possibly intake gaskets we have seen not seal and suck oil from the valley

note: we did not build this setup so I can not answer things in much detail

Speedracer2j

iTrader: (8)

Ok, let me give you a little background on this build, maybe it will help you to understand a little better my situation. Bought this motor from a friend in town, he is kind of a LT/LS guru. It came from a 1996 Vette, and was just freshened up in the winter. The Vette owner decided he wanted to goto a Turbo LS setup. I paid $3500 for the complete motor, from oil pan to throttle body. I was under the assumption originally it had a big hydraulic roller. Well, the guy who originally built this setup didn't realize the owner had taken it to someone else, and had a solid roller put in, so he retrieved all the information for me he could. With this setup in an A4 vette, it was going 12.20's NA and 10.40 on a 200 shot consistantly. The original owner, spent alot of money on this setup, but didn't always place it in the right places. It had never even been on a dyno. My father, and friend installed this setup in my car while I was in Iraq, so really I haven't had "Hands On" the car too much just yet, because I am still here. I agree, it seems to drop off early for a solid roller, but what to do, it runs solid... As far as the specs, these are all the numbered provided to me. I had no hands in the engine build either, so I can't say what the heads TRUELY flowed, or at how many in. of water. I know there is alot of good parts in this setup...from the comp stainless rockers, to the forged bottom end. Pretty much I bought a TV Dinner. These numbers don't justify me to tear it down, and I.D. the issues right now, but rather spray it and have some fun. It will be tore down this winter, or the next, and then it will be MY build. So really, any advice or suggestions i'm up for them. The smoke, well, has not been determined yet, but its hard to get your wishes completed when you ask questions through a telephone. They did say it smoked much less, from the first pull to the fifth. I always wondered if my rings had just not seated yet, or if a cylinder wall was washed. I will be back this summer, and I am certain this thing will be in mint shape at that point. Thanks for the suggestions and concerns, but IMO 414hp NA, for a motor I spent $3500 for... Is right where I should be. Hook up the bottle and lets go... It will be in the 10's.

RamAir95TA

iTrader: (2)

Unless you ID the smoke, you might end up back in the garage if you decide to spray it, instead of being in the 10s.

Nostang

iTrader: (4)

The numbers look realistic for the combo. The restriction is probably in the heads and intake as you need a bigger intake port to make a 383 scream to 7000+. However, the wrong valve springs can cause the higher rpm drop symptom too. I wouldn't worry too much about the smoke as the rings could be setup loose for the spray and have some blowby causing the smoke on the NA runs. You should do some passes and shut off at WOT NA too read the plugs. In the video it almost seemed like the smoke was coming from something rubbing on the car...check that as well.

SS RRR

iTrader: (2)

Not for a solid roller stroker, unless it is dyno/dyno operator error...
Very untrue.
You mean like valve float? There is no valve float in that graph.
Yikes...

FASTFATBOY

iTrader: (23)

Mine has a solid roller bigger than his(.254@.050 on a 108) MUCH bigger heads and intake and mine peaks at 6500, doesnt fall off but flattens out.

Is lacking on power, depending on the size of the converter. DOnt forget that.


Also mine put 441 unlocked and 463 locked to the rollers with 431lbft of tq. It had some problems though and are fixed now. I dont put much faith in dyno numbers unless its a six speed.

SS RRR

iTrader: (2)

It is a six speed.

FASTFATBOY

iTrader: (23)

Yeh it should make more power.

I looked at my old dyno graph in the dyno section. Mine starts to flatten out at 6200 and stays pretty flat until 6700.

Nostang

iTrader: (4)

Power is all in the heads/intake. We don't know who ported the heads, the intake runner size/shape, combustion chamber size or compression. All of those variables could make a combo that ranges from 400rwhp all the way up to ~480rwhp.

Depends on your definition of small vs large runner size. I should have clarified. It is much harder to make power to over 7000 rpms with a 180cc head than with a 195+ head.


Correct, the graph does not look like a typical valve float. However, it is something to check if he ever decides to step up on the heads. Not sure what the yikes comment is about. The vid makes it seems as though the tires are rubbing on the fenderwell but it is hard to see. If not it is probably blow by from the rings in which case reading the plugs would indicate how much oil is getting on the plugs.

JMO....everyone has one.

RamAir95TA

iTrader: (2)

To be honest, that graph looks like something a typical hydraulic roller heads/cam car would put down. The OP says he has no idea what's in the motor, so who knows WHATS done to it?