It's finally tuned - 637 RWHP today

**Marty G Cars** · 08-03-2005

I just got back from the chassis dyno with my 69 Camaro and on the 4th pull it showed 637 RWHP. The Michelin's (335/17) were a little too hard for ideal numbers as they kept going up in smoke from lack of traction (or too much torque). The guy that did the final tune of the FAST fuel injection said that he was sure that with a better tire he could pull 675-700 HP to the wheels no problem. I told him that for a pump gas street car I wasn't worried because I couldn't even handle what it was putting out right now. It was a sight though, as soon as the motor was fired it looked like someone dropped a sugar cube on an ant hill the way everyone appeared and crowded aroung the bay. I wish I would have taken a video cam.

The motor pulled so much air that it pulled the rear air filter out of the air box on the first run! The air box will certainly have to be re-engineered to a quality design that can handle the air flow. Anyone know a (good, experienced) designer/tig welder that is up to the challenge?

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**Ralph LoGrasso** · 08-03-2005

WOW! 637rwhp, very nice! Post some engine specs if you can.

**Travis B** · 08-03-2005

637rwhp
that is layin down some power
very impressive!!

i'm with Ralph lets see some specs

**Nine Ball** · 08-03-2005

Too bad it didn't hit 638, then your username could have a double meaning!

Nice numbers, must feel scary!

**ViperBlue68** · 08-03-2005

WOW! have u had any road time with it yet? it must be a blast! please post some more pics!

StreetKing this is the 69 I was talking about in your "what engine" thread if u see this......

**96Z28SS** · 08-03-2005

Originally Posted by Nine Ball

Too bad it didn't hit 638, then your username could have a double meaning!

Nice numbers, must feel scary!

you could round up 637.5 to 638

**Marty G Cars** · 08-03-2005

The actual output was actually 637.5 so rounding off would actually result in 638HP.

The motor specs are;

Dart M big block (iron)
4.628 bore x 4.75 stroke
Rod length 6.7
10.5:1 pistons
Big Chief 18 degree aluminum heads
Cam
Intake duration 263@50 Lift .725
Exhaust duration 270@50 Lift .712
Degreed 108 intake center line
Valve overlap 43.7 crank degree
Lobe seperation 112.1
Cylinder head flow
Intake 421 cfm
Exhaust 296 cfm

To see the specs on the rest of the car and some pics go to my vBGarage.

**Marty G Cars** · 08-03-2005

For anyone that doesn't want to calculate the motor is 638 cubic inches (hence 69camaro638), but now that will represent RWHP too!

I hope I can learn to handle this beast

**yody** · 08-03-2005

Wow pretty good numbers for such a mild cam!! It must make for an exremely "driveable" motor with huge power. Just being able to tell people you have a "638" must be cool. Imagine going to the parts store
you: "need some brake pads"
them: "what year?"
you: "69 camaro"
them: "what motor? 307 or 350?"
you: "638"
them "638 What???"
LOL

**ProTeal55** · 08-03-2005

What kinda trans. is behind that beast of a motor ?
Any pics of the car ?

**Streetking** · 08-03-2005

Originally Posted by ViperBlue68

WOW! have u had any road time with it yet? it must be a blast! please post some more pics!

StreetKing this is the 69 I was talking about in your "what engine" thread if u see this......

Sweet!! What was the rpm on that pass, your dyno sheet doesn't show it.

SW

**Marty G Cars** · 08-03-2005

I believe it was 6600 rpm. This is a solid roller motor and I had the engine builder with me today. He said it was capable of twisting to 7000-7500,

but not with me behind the wheel.

**Steve1968LS2** · 08-03-2005

That is a LOT of power.. damn..

Hold me.. I'm scared!!!

7000 RPM? Dayumm..

**Marty G Cars** · 08-03-2005

Also, just remembered that the guy running the dyno tried one pull in 5th gear in an attempt to reduce wheelspin (It's a Viper T56 six speed) but it didn't help. He then asked me if I knew that I had a 200mph car because it hit 158 mph in 5th and it could certainly get to 200 in 6th (but again, not with me behind the wheel). I hope my wife doesn't see this thread.

**WS6** · 08-03-2005

alright well if you were up at team ford then you live out north of Atl most likely. so when are you planning to bring the car to the Year One Braselton Bash? those are some impressive numbers. was it through full exhaust?

**dropit69** · 08-03-2005

ok ,,is that your other cars in the garage pic? the viper and the other camaro..im doing something wrong..only 1 camaro in my stable..

**Marty G Cars** · 08-03-2005

I'm in Canton. I'll have it out and about as soon as I have it finished up. There are just a few minor items left but it may take until mid September. I am very familiar with YearOne as I actually worked there in sales for a grand total of 8 days last summer (trying to find something to do, but it wasn't right for me). I'll have it at the local cruises and possibly at the Good Guys event in Charlotte, NC in October.

**Marty G Cars** · 08-03-2005

Oh sorry, yes it was a full exhaust -

2.25" primary headers
4" dynomax collector mufflers
3.5" oval x-pipe
3.5" oval pipe spin tech mufflers
3.5" oval pipe over the rear to behind the rear wheels.

And as far as my stable (dropit69) yes I have 2 Camaros and a Viper, you're not doing anything wrong, I just sacrificed, worked hard, took risks and got lucky - anyone can do it if I can.

**ProdigyCustoms** · 08-03-2005

Love the numbers. Trying to figure something out. Is this a 3rd gear run? It is only running 107MPH at 6600RPMs. Does it have a 4.88 in it? If it is not a 3rd gear run, how can 5th gear pick up 50MPH to run 158?

**boodlefoof** · 08-03-2005

Schwinggg! That is awesome!

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It's finally tuned - 637 RWHP today