Ryan's Camaro Project Thread...

[55starchief]

Quoting: FUBAR

I used the search function before asking & it only cam up with 4 mentions of DTD, 2 of which (6 now!) are in this thread!

http://www.mkb.cc/forum/index.php?action=vthread&forum=18&topic=1867\" target=\"_blank\" rel=\"nofollow\">http://www.mkb.cc/forum/index.php?action=vthread&forum=18&topic=1867

[FUBAR]

Right, 1st The Picture... (DeanO, you're going to Like this!)

[FUBAR]

Now the Explanation...

Thats the Torque & Power Curve for a 337ci 305 Stroker, Kit Here:
http://www.dallasexportsales.com/RA334.htm\" target=\"_blank\" rel=\"nofollow\">http://www.dallasexportsales.com/RA334.htm
(I'm looking at the $1495 Kit)

this requires a .1in Overbore on the cylinders,
Edelbrock Performer Cam
Edelbrock Performer Intake Manifold
STOCK GM Heads (Cheap!) with a 0.10in Increase on the exhaust Valve side only.
-6deg Retard on the Cam timing

Peak Power of 268hp at 4500rpm
and basically a Flat Torque curve from 2000-3500rpm...

[FUBAR]

Also with some Roller Rockers & a windage tray i'd imagine we'd pick up a few more horses too, DTD can't account for that.

This is sounding like a plan to me!

[55starchief]

desktop dyno for teh win !!!!!!!111111

Glad i could help with some of those little tricks to pick up power here and there

[FUBAR]

DeanO assuming you've got Vortec heads and using GM Part No. NAL-VORTECZZ5  as a basis, you're graph looks like this:

[FUBAR]

And with a 471 Blower... although there's probably a load of other mods you'd need to make with this as well...

[55starchief]

You cant help but play can you the blower version needs the exhaust enlarging and it would pick up a little more power

[Roadkill]

I smell burning Credit Cards . . . . .

[55starchief]

Quoting: FUBAR

And with a 471 Blower... although there's probably a load of other mods you'd need to make with this as well

Yeah you could run a much more radical cam as the blower would smooth it out nicley

[FUBAR]

Quoting: Roadkill

I smell burning Credit Cards . . . . .

Me too...

[FUBAR]

Oh yeah, and i'm also going to look into the possibility of using a Road Demon 625cfm Carb instead of the computer control.  but we'll see about that...

[55starchief]

Ok this is with a more radical cam, definatley worth it in my opinion

[FUBAR]

Graeme, set the CR to 9.4 because of the stroker kit...

[55starchief]

Quoting: FUBAR

Graeme, set the CR to 9.4 because of the stroker kit...

With a blown aplication you would run less comp ratio matey.

[55starchief]

Ahhhh perfection and only a 50hp shot of NOS and half the boost

[FUBAR]

Quoting: 55starchief

With a blown aplication you would run less comp ratio matey.

Righty Dokey

Nice graph that one, basically a flat 500 right across the board

[55starchief]

Quoting: FUBAR

Nice graph that one, basically a flat 500 right across the board

Yeah a real monster, would need to add 4 bolt mains if you built it like that

[FUBAR]

Quoting: 55starchief

would need to add 4 bolt mains if you built it like that

Yeah I would not be building my Motor quite that much.

[philoldsmobile]

Quoting: 55starchief

Yeah you could run a much more radical cam as the blower would smooth it out nicley

actualy blowes want much less cam, otherwise they blow all the mixture right out the exhaust..
look for as little overlap as possible with a turbo or supercharger...

lift is ok, but overlap is baaaaaad...

the old roots type superchargers are called 'external compresiion' in so far ass they do not produce a compressed mixture, they simply cram more mixture into the cylinder, where it becomes compressed, even before the piston increases compression any more.. by having an exhaust valve still open, it just gets shoved out, and looses huge ammounts of power, by the time the inlet valve is begining to open, the mixture wants to be presented with a closed combustion chamber.

this is why supercharged engines often have very smooth idles..

[55starchief]

Quoting: philoldsmobile

Quoting: 55starchief
Yeah you could run a much more radical cam as the blower would smooth it out nicley

I was told this by the founder of BDS when i was going to add a supercharger to the pontiac mate, hence the reason i posted it. He said that the charger smoothes the idle out

[philoldsmobile]

perhaps some crossed information?

you want zero overlap on a boosted car...
have a look at the specs for any turbo or supercharged stock engine..

perhaps he ment the lack of overlap smooths it out, but you can use far more lift than otherwise would be the case?

stands to reason, that any period where both valves are open, the mixture enters one and fecks off through the other....

scavenging is not important on a boosted engine, and that is the main reason for overlap.

[55starchief]

if you look at the grinds on all the cams he supplies they are not mild

http://www.blowerdriveservice.com/bcamspecs.php\" target=\"_blank\" rel=\"nofollow\">http://www.blowerdriveservice.com/bcamspecs.php

[philoldsmobile]

not masses of overlap though.....

[philoldsmobile]

how do the specs vary between turbo and superchargers? turbo's have a much higher mixture speed., does that affect the overlap situation as the mixture is moving far quicker?

TBH blowers aren't my forte, i know turbo's much better..