zacharyhorn

iTrader: (1)

I still have not run my car on the road. I have a 355 small block 10.5:1 compression ratio, 4 bolt main w/ forged Weisco (sp) flat top pistons, stage II connecting rods, ground stock crankshaft for the shortblock. I have Dart Iron Eagle Platnium 215cc/64cc cylinder heads. Clevite 246/246 @ .050, .531/.531 INT/EXT solid lifter camshaft with the Scorpion 1.6 roller rockers, performer RPM intake manifold and a freshly rebuilt Holley 650 DP. Exhaust consist of Hooker Super Comp 1-3/4" long tube headers and a custom 3" y-pipe to a custom 4" exhaust over the axle w/ a dynomax bullet muffler. All backed by a T-56 Transmission to 3.73 Richmond gears and a Zexel posi unit. Could somebody give me an educated guess on how this car will do HP/TQ wise, or quarter mile wise roughly? The only suspension mods I have are UMI SFC's and Lakewood lower control arms, poly torque arm bushing and drag radials. It's been under construction for over 2 years now and I get to take it out this summer.

Your opinion is appreciated.

WheelsUp84z

iTrader: (2)

i think you're going to need more carb honestly, a 650 even though its a DP is pretty small for those heads/cam. If you run it as is, it should make an easy 400/420 at the wheels, a bigger carb it could make more. As far as track times, it all depends on how heavy the car is, how your suspension is setup and how well you can launch and shift gears in the manual. 11's should be attainable if you're a good driver

5678TA

a 750dp and 4.10's would put you mid 11's, maybe low.. so around 400rwhp.. maybe 425 max..


one last thing, GET LCARB's!! drag radials, stick, that much power and no LCARB's do not mix well..

zacharyhorn

iTrader: (1)

What should I gap my spark plugs at? Right now I believe I have them at .050 or .045. I'm aiming to trap around 115mph with this combo as well. Is this possible, knowing traction is going to be an issue?

WheelsUp84z

iTrader: (2)

115 should be easy, traction doesnt effect trap speed as much as it does ET. that gap is a bit big, i would say .040 you will alright. if you plan on nitrous close them up to .035 or so. i run my ngk TR-8's at .030 but i also spray 300 shot of nitrous

rhamm1320

Here is the computer dyno. I wasn't sure on the intake centerline and lobe seperation so I used the values of a similar camshaft.

5678TA

it is VERY possible.. last night i trapped at 114 on 275/50-15 mt dr's.. crappy 1.82 60ft.. and i have maybe a 360-375rwhp car.. 115 should be cake with your setup.. and i run a manual as well.. jeez, i love slammin them gears and beating auto's.. LOL

zacharyhorn

iTrader: (1)

Thanks for the dyno graph. That looks about where I want to be. I just hope my new centerforce DF holds up to it in the T-56.

zacharyhorn

iTrader: (1)

I am currently running the stock tbi fuel pump w/ the Mallory FPR down to about 6 psi at idle. Will this be enough pump for now until I get more money and time to drop the tank?

ross

I think with good tires you're set up will go 11.70s. I also think the 650dp will work and for the na sayers I have gone 11.30s with a 650 swaped it for a carb shops 925 on the dyno it made avd 10 hp more at the track it made .02 et. And for the fuel pump save the money and do it right drop the tank and weld a bung on the bottom and get a good electric pump or install a good mechanical pump.

zacharyhorn

iTrader: (1)

Do you think I can get by on the stock pump for a while as money allows? I hope I can run it as is for now. All I need to do is get my custom 4" exhaust over the axle and to the muffler I bought. Then it's tuning time.

Zach

ross

I do not think the stock fuel pump will do it you can try but I would put a fuel pressure gauge and do a few wot passes.

zacharyhorn

iTrader: (1)

How accurate is the desktop dyno that rhamm1320 posted up? He pretty much nailed everything on the head except I have 2.05 valves on the intake. I started my car two days ago and it sounds pretty wild. I can't wait to drive it.

Zach

zacharyhorn

iTrader: (1)

ttt

1320_Guy

iTrader: (3)

So any news?

zacharyhorn

iTrader: (1)

Still no passes as I'm still trying to break in the clutch. The motor is broken in now and seems pretty strong. I'm only shifting it at 5,000 rpm right now because its new and the clutch is new. The track closed in early october...

Hope I can reach low low 12's...

zacharyhorn

iTrader: (1)

Also, how big of a difference does it make that my cam is a Clevite cam? 246/246 .53/.53 lift @ 108 lsa?

Sonix

iTrader: (1)

Have you done much tuning yet in the way of jets? There's got to be a dyno nearby. You should drop by. $80 for 3 pulls is pretty normal, when you think about it that's 2 tanks of gas - not bad. Or rent it for 2hrs for more $$, then you have time to make some changes.

That cam has lazier ramps than some others i'd think. That's .530" lift with 1.6 rockers right? It should be pretty peaky with that low LSA. Got a digital camera with video feature? I'm planning on getting a cam this winter in that range (240 @.050, 108LSA, .480" lift)

327???

Is it a solid flat tappet or roller?

If you can get it off the line 11's shouldn't be a problem.

xpndbl3

iTrader: (5)

zach let me drive....you'll run quicker.

we'll hit up great lakes dragaway in the spring

zacharyhorn

iTrader: (1)

I'm up for that. Let me know when, but I still need to replace the fuel pump and convert my rubber fuel lines to braided or steel before I can pass tech. Also need to finish breaking in the new clutch. Its to cold to do anything outside my house. We have about 12" of snow on the ground. I won't get to it until march or so. Sounds like a good idea though.

To 327? it is a solid flat tappet cam w/ 1.6 roller rockers. The lift numbers I provided were with the extra lift from the 1.6 rockers.

xpndbl3

iTrader: (5)

come march/april we'll see about setting something up....too cold to do anything else.

1QWIKZ

11's should not be a problem if you get it the ground....If money is an object then I would go with the Carter mechanical Strip pump cheap and works great! IMHO! Good luck!

zacharyhorn

iTrader: (1)

Sounds like a plan, I'll have to find a trailor, I don't know if I want to drive my car all the way there and back, and if I would break, I would be screwed.

81caballero

i stumbled across this site, doing a google search for a mahl/ceivite cam that I just bought...this site and post came up. very intersting article, I dont own a camaro, but i do own and race an 81 gmc caballero diablo. I just finished maching and parts gathering for a 355" SBC. I am running the 906 vortec heads, ported and poliched, studs and guideplates etc. Intake choice i went with a professional products hurricane single plane intake. question I have for you is what spring did you run?....Im at the stage on buying springs, but being its a solid lifter cam, what seat pressure should I run. I am thinking and comparing to similar cams at 125 lbs. seat, 325 lbs open, but being its a big duration smallish lift cam, will be .504" lift with 1.52 roller rockers. I was aiming for a low 12 pass, but you guys are thinking mid 11's with a camaro with his set up, thats not bad at all. looks like an intersting site with good info.....great. thanks alot.

mw66nova

iTrader: (13)

81caballero, sounds like a cool little truck/car/thing, lol! i would run an isky 235D spring for your application.

zacharyhorn

iTrader: (1)

The weather is starting to go my way finally, I really hope for a low 12 with the tires and suspension I have. All I have to do is re-lash my valves and fill her up with new oil and I'm ready to finish breaking in the clutch.

81caballero

got mine up and running, love that little cam.....pulls hard and very quick....and its not as noisy as i had anticipated, but its showing lots of potential.

zacharyhorn

iTrader: (1)

Well, as luck would have it, I broke my leg pretty bad about 2.5 weeks ago and had to have surgery. It was my right leg so I won't be able to drive for the next 6-8 weeks. I did not get to run my car at the track and I'm really dissapointed about it. I ran it around on the street some this year and thought it did pretty well considering not having traction in first gear and running the stock tbi pump. Oh well. Maybe next year, this is getting frustrating...

xpndbl3

iTrader: (5)

i'll run it

zacharyhorn

iTrader: (1)

Haha, if you were a tad closer I'd probably let you. I'm really curious to see what it does as I really have no clue... We should go fishing next year...

xpndbl3

iTrader: (5)

if you take it to great lakes dragaway I'll beat on it for a few passes to let you know how it does when I'm up there racing.