Messages

76

Matt Shaff's Engine Shop / Re: sbc HP per cubic inch

« on: September 20, 2015, 12:48:47 PM »

Thanks for the reply Matt
The current cam is smallish  I.630 E.630  268 270 @ 50 and ground on a spikey 106 Separation. Pulls very hard to 6000 rpm then its all done.
I've got a new spec. I think I'll try with the new heads. I.663 E.688  278 284 @ 50 on what should be a little broader power band 110 separation.
Matt new Heads are Brodix 12 with heavy port work 2.20 Intake valve 1.60 exhaust valves.
Stack injected, down nozzles and 16 to 1 comp.

77

Matt Shaff's Engine Shop / Re: sbc HP per cubic inch

« on: September 20, 2015, 10:04:08 AM »

Thanks 1167.
 I run Brodix - 12 15 degree heads. My Old heads flowed 360@ .700. The new 12's are a solid casting with more porting. They flow 390@ .700.
I'll get my goals with a few updates to the old engine. Starting to second guess the set up. With comments like.  Not enough rod ratio (6 in rod). Not enough piston dwell time. Need a shorter stroke and spin it harder. Not sure if I agree with these guys. Some good things are hard to change.
 

78

Matt Shaff's Engine Shop / sbc HP per cubic inch

« on: September 20, 2015, 06:49:02 AM »

Matt
  Many variables but in your years of dyno sessions have you seen any patterns develop as to best sbc bore stroke (sweet spot).
I've been making 700hp @ 6000 RPM. 4.125 bore X 4.00 stoke. My set up needs 750hp @ 7500 RPM. My new heads and cam will get me there.
Going to freshen up a bit in the off season. Just wondering if I need to re invent the wheel bore and stroke wise or if the 434 chev is still a good choice for this range? Thanks   

79

Matt Shaff's Engine Shop / Re: cam differance for alky

« on: September 18, 2015, 07:34:38 PM »

+1 Bullet cams have reground several cams for me. Talk to Tim. He's a lot of help and a southern gentlemen to boot.

80

Drag Racing / Re: Stagging Rules / Etiquette

« on: September 13, 2015, 07:32:07 PM »

Staging in reverse then nailing first gear is a good way to have an explosion with many transmissions! Just sayin

81

Wanted to sell / Re: NEW SIMPSON SKYJACKER CHUTE WITH ALUMINIZED PACK

« on: September 03, 2015, 10:44:25 AM »

Just arrived. Looks good. Thanks

82

Matt Shaff's Engine Shop / Re: How much HP can a stock cast iron Pontiac block take?

« on: September 03, 2015, 10:39:14 AM »

Glen
 I like the some where between 400 and 2000 HP answer.      I thought I was the only one!

83

Wanted to sell / Re: NEW SIMPSON SKYJACKER CHUTE WITH ALUMINIZED PACK

« on: August 25, 2015, 07:27:38 PM »

Dave the Money order went out today.
Nice to Chat with you.
Keep er straight
Kevin

84

Front Engine Dragsters / What "Bamboozeled" you at the last race?

« on: August 18, 2015, 05:02:50 AM »

On my second pass I let go of the button and stuck good. The fed hiked the front wheels higher than it should have. I really had the "this is gonna be a good pass kind if feeling". 2 seconds later the air shifter fails second gear. It starts to rain at the turn off and I have to go home with my tail between my legs. Dang the bad luck!

85

Spud Miller's Cave / Re: Toluene and % Nitro

« on: August 11, 2015, 10:34:44 AM »

All I can say is "Remarkable longevity" Spud!

86

Spud Miller's Cave / Re: Motor will not fire,keep having to prime 80a pump ? Plugs keep washing out, Help

« on: July 21, 2015, 07:07:07 PM »

Hang in there Pat. Give us a little more info. does it fire at all?

87

Drag Racing / Re: Nostalgia Drag World

« on: July 01, 2015, 04:15:25 AM »

Outstanding! Great Pictures!
Thanks Paul

88

Drag Racing / Re: Reunion race

« on: June 21, 2015, 03:24:37 PM »

Congrats for sure Glen. That's an experience You'll never forget!

89

Front Engine Dragsters / Re: Front Tires

« on: June 18, 2015, 05:35:17 AM »

Just put a new set of Hoosier 22 X 2.5 X 17 on my FED. I resisted the urge to buy some really cheep fronts only after an old race buddy told me the "story" of one flying off and hitting him on the helmet @ 200 MPH