C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Holley 1000hp: Annular or dog-leg boosters?

Thread Tools
 
Search this Thread
 
Old 01-31-2007, 03:26 PM
  #21  
GrandSportC3
Team Owner
 
GrandSportC3's Avatar
 
Member Since: Jul 2001
Location: Lakeland, FL
Posts: 182,997
Received 83 Likes on 58 Posts
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17

Default

Originally Posted by Highhat
great article!! Looks that I did well when selecting my carb..
They recommend it for durations over 220 degrees and mine is 270 degrees @.050
Old 01-31-2007, 04:15 PM
  #22  
Doug S
Instructor
 
Doug S's Avatar
 
Member Since: Dec 2004
Location: Gainesville GA
Posts: 124
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Marks69BB
Doug - The 572 crate you refer to most likely has a mild hyd roller for the street.


The new cam will be a solid roller with 262 @ .050, .715 lift. In a 555 I would think, unless the Demon can actually flow over 1000 cfm, it won't be enough. As I asked before, can it be modified to flow more?

And if not, what would be your recommendation from the Demon line? Price?
I'm sure you could have someone try to port it, but if not done properly it will ruin the carb. It's not something we offer.

If you'll give us a complete list of all the engine, and driveline specs I should be able to point you in the right direction.

Technical Support,

Barry Grant, Inc.

www.barrygrant.com
Old 01-31-2007, 04:39 PM
  #23  
69 N.O.X. RATT
Safety Car
 
69 N.O.X. RATT's Avatar
 
Member Since: Aug 2001
Location: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Posts: 3,887
Received 9 Likes on 8 Posts

Default

Originally Posted by GrandSportC3
great article!! Looks that I did well when selecting my carb..
They recommend it for durations over 220 degrees and mine is 270 degrees @.050
Oliver, I'll bet with your set up your car would be faster with
down legs.
Old 01-31-2007, 05:36 PM
  #24  
Marks69BB
Melting Slicks
Thread Starter
 
Marks69BB's Avatar
 
Member Since: Jun 2001
Location: NC USA
Posts: 3,281
Likes: 0
Received 3 Likes on 3 Posts

Default

Originally Posted by Doug S
I'm sure you could have someone try to port it, but if not done properly it will ruin the carb. It's not something we offer.

If you'll give us a complete list of all the engine, and driveline specs I should be able to point you in the right direction.

Technical Support,

Barry Grant, Inc.

www.barrygrant.com
Engine: Bowtie 555ci with ProTopline 320cc AL heads, 10.5-1 JE pistons, Victor Jr. single plane, Hooker header/sidepipes (2 1/4" primaries into 4" collectors), solid roller cam with 262 duration @ .050, .715 lift.

Driveline: McLeod Street Twin clutch, Tremec TKO-II 5 spd (3.27 1st gear) and 3.08s out back (may grow to 3.36s or 3.52s)
Old 01-31-2007, 06:01 PM
  #25  
GrandSportC3
Team Owner
 
GrandSportC3's Avatar
 
Member Since: Jul 2001
Location: Lakeland, FL
Posts: 182,997
Received 83 Likes on 58 Posts
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17

Default

Originally Posted by 69 N.O.X. RATT
Oliver, I'll bet with your set up your car would be faster with
down legs.
I think that either way, it wouldn't be more than 2 - 3 hundreds at the track...
Old 01-31-2007, 06:09 PM
  #26  
Doug S
Instructor
 
Doug S's Avatar
 
Member Since: Dec 2004
Location: Gainesville GA
Posts: 124
Likes: 0
Received 0 Likes on 0 Posts
Default

On your combination we'd go with a 1000 Race Demon. It will give you better atomization for the fuel with your cam profile, and increased air flow without the choke tower and assembly.

Technical Support,

Barry Grant, Inc.

www.barrygrant.com
Old 01-31-2007, 11:39 PM
  #27  
427Hotrod
Race Director
 
427Hotrod's Avatar
 
Member Since: Jan 2000
Location: Corsicana, Tx
Posts: 12,603
Received 1,874 Likes on 912 Posts
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist

Default

Here's a link to a C-454 dual plane. It's not perfect...but it's the one I was talking about. It will fit a Dominator under an L-88 hood.


http://cgi.ebay.com/ebaymotors/EDELB...QQcmdZViewItem



I use a 1050 Dominator with annulars on my 540. With my 3.07 gears they help keep throttle response crisp. I originally set it up to work on my 427...but it does Ok on the 540. I've done back to back dyno and strip tests with a Mega $$$$ modified 1400 cfm Dominator and a $1300 AED 1150. Neither made any more power or ran any faster. Well OK..the 1400 made 6 more HP at the peak..but was a slob under 5000 rpm. The AED was slower on my car. Until I change things to move more air..the 1050 is plenty.


JIM
Old 02-02-2007, 03:09 PM
  #28  
Marks69BB
Melting Slicks
Thread Starter
 
Marks69BB's Avatar
 
Member Since: Jun 2001
Location: NC USA
Posts: 3,281
Likes: 0
Received 3 Likes on 3 Posts

Default

Originally Posted by Doug S
On your combination we'd go with a 1000 Race Demon. It will give you better atomization for the fuel with your cam profile, and increased air flow without the choke tower and assembly.

Technical Support,

Barry Grant, Inc.

www.barrygrant.com
Doug - I called your tech service dept to ask more questions about the 1000 and he asked about my engine/driveline. He asked if the 5th gear of the tranny was 1:1 or an OD and, finding it was OD, recommended the Race Demon RS 950 which is essentially a 1050 with annualer boosters since he says the cam will have a hard time with cruising in 5th at low RPM without them. He also said that with the removable sleeves, I could cater the carb size (flow in cfms) to what works the best. So what is your take on this?
Old 02-02-2007, 03:15 PM
  #29  
Doug S
Instructor
 
Doug S's Avatar
 
Member Since: Dec 2004
Location: Gainesville GA
Posts: 124
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Marks69BB
Doug - I called your tech service dept to ask more questions about the 1000 and he asked about my engine/driveline. He asked if the 5th gear of the tranny was 1:1 or an OD and, finding it was OD, recommended the Race Demon RS 950 which is essentially a 1050 with annualer boosters since he says the cam will have a hard time with cruising in 5th at low RPM without them. He also said that with the removable sleeves, I could cater the carb size (flow in cfms) to what works the best. So what is your take on this?
It would be a toss up between the two carbs, the main advantage of the RS would be that you could alter it based upon engine changes that you make in the future. I've run with both, and there really isn't going to be much difference with your gearing.
Old 02-02-2007, 03:52 PM
  #30  
gkull
Team Owner
 
gkull's Avatar
 
Member Since: Apr 1999
Location: Reno Nevada
Posts: 21,743
Received 1,327 Likes on 1,057 Posts

Default

Originally Posted by Doug S
On your combination we'd go with a 1000 Race Demon. It will give you better atomization for the fuel with your cam profile, and increased air flow without the choke tower and assembly.

Technical Support,

Barry Grant, Inc.

www.barrygrant.com
What would you recommend for my new 434 small block. 7500 rpm Brodix single plane will have Brodix 15 degree heads soon with 272 cc intake. 11.8 compression. Road racing Solid roller with 248/250 110 LSA .685/.715 lift. Very free flowing race exhaust with race mufflers.
Old 02-02-2007, 04:14 PM
  #31  
Doug S
Instructor
 
Doug S's Avatar
 
Member Since: Dec 2004
Location: Gainesville GA
Posts: 124
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by gkull
What would you recommend for my new 434 small block. 7500 rpm Brodix single plane will have Brodix 15 degree heads soon with 272 cc intake. 11.8 compression. Road racing Solid roller with 248/250 110 LSA .685/.715 lift. Very free flowing race exhaust with race mufflers.
What are you doing with this combination?
Old 02-02-2007, 09:28 PM
  #32  
GrandSportC3
Team Owner
 
GrandSportC3's Avatar
 
Member Since: Jul 2001
Location: Lakeland, FL
Posts: 182,997
Received 83 Likes on 58 Posts
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17

Default

Originally Posted by gkull
What would you recommend for my new 434 small block. 7500 rpm Brodix single plane will have Brodix 15 degree heads soon with 272 cc intake. 11.8 compression. Road racing Solid roller with 248/250 110 LSA .685/.715 lift. Very free flowing race exhaust with race mufflers.
Wow, that's a sweet setup!! Sounds like a 750+ HP engine



Quick Reply: Holley 1000hp: Annular or dog-leg boosters?



All times are GMT -4. The time now is 12:06 PM.