Profiler 375’s or Brodix BB3-xtra

August 20, 2018, 01:54 PM

Bob Payton

Back in the day the 1802 Duke heads where worth some et. You could probably get them pretty cheap now. I ran 7.18@187 with a 1940lbs dragster. That was high 4.50s to low 4.60 with a single terminator.

August 20, 2018, 07:16 PM

racerdude2054

quote:
Originally posted by TOP38:
quote:
Originally posted by SCDIV1:

I have seen some real strong SR-20 headed engines lately. Makes me want one.....

I have one now, Dart's version - Pro20's. 632 single race gas carb has run 6.76 and 197 plus at 1840 lbs. Great combo. This motor is a good 25 pounds lighter than my old 12 degree 632 and runs the same!

What was the difference in MPH between the 12 degree and SR20 combos?

August 20, 2018, 09:30 PM

Bigdrive88

I guess because I havent seen or heard of anyone doing it. I know people who have tried to run alcohol carbs with them without much success. I have also entioned it several times on different forums & no one has told me otherwise.

quote:
Originally posted by Dave Koehler:
quote:
Originally posted by MorgretNation:
Problem with the Sr20 is I want to keep running the alcohol injection. I know alot of people running those heads but none of them is running alcohol

Not that the head change will be a life changer but I'm just curious as to what makes you think you can't run the terminator with the SRs?

August 20, 2018, 11:40 PM

TOP38

quote:
Originally posted by TOP38:
Running alky in a high HP/CID application is much easier with injection vs a carb due to the fact you MFI can supply both quality and quantity at the same time. Carbs have a tougher time doing both. Since we are not talking Comp/PS here there are no magical parts that alky needs vs gas but when running some heads such as 12 degree BC and the SR/Pro 20 heads also fall into this area, some chamber mods are required. I number of years back James Monroe built a motor, not sure what size, in the 598 range, with 12 degree Profiler BC heads using a Ron's terminator and it ran great!!!!

So there is no reason you can't use a set of SR20 or Pro 20 heads and use alky!

About 6 or so years ago I ran a 565 with Brodix HH's (383's) with a Terminator setup. Ran it in a 1925 lbs RED and it ran 4.50's in good air but mostly 60's using a soft hit 8" converter! No magical alky cam was used in this combo.

August 20, 2018, 11:44 PM

TOP38

quote:
Originally posted by racerdude2054:
quote:
Originally posted by TOP38:
quote:
Originally posted by SCDIV1:

I have seen some real strong SR-20 headed engines lately. Makes me want one.....

I have one now, Dart's version - Pro20's. 632 single race gas carb has run 6.76 and 197 plus at 1840 lbs. Great combo. This motor is a good 25 pounds lighter than my old 12 degree 632 and runs the same!

What was the difference in MPH between the 12 degree and SR20 combos?

If anything the Pro 20 is slightly faster! The Pro 20 combo has a little more lift cam wise but less compression than the 12 degree.
The graphs on my racepak are identical using the same carb and converter comparing one to the other!

August 28, 2018, 03:43 PM

Mike Frizie

may wanna look into the Race Flow Development RFD 24 - B ( non-MC ). supposed to make good power on the alky!

Race Flow development 24-B

Just completed a 584 with these heads. just waiting for a sunny day to see results.

August 28, 2018, 06:09 PM

Mike Frizie

SCDiv1, pm sent

August 28, 2018, 06:39 PM

SCDIV1

Got it and pm sent back to you.

September 11, 2018, 11:33 AM

Mike Frizie

PM SENT BACK

September 15, 2018, 08:09 AM

gxp7903

[QUOTE]Originally posted by DRB Motorsports:
may wanna look into the Race Flow Development RFD 24 - B ( non-MC ). supposed to make good power on the alky!

Race Flow development 24-B

I had these on my 582, went high 60s low 70s mostly. Best of 4.61 down in Richmond.

I built a 632 last winter and put these heads on it. Have been running 4.50s all year. Mostly ive tested converters this year, Think ive had 7 converters in and out of it. 4.52-4.54 151 currently. Have found maybe .06 between em.
Even sprayed a little shot for a Q32, went 4.44 155.
Oh yeah, single alky carb.

September 17, 2018, 12:45 PM

Mike Frizie

quote:
I had these on my 582, went high 60s low 70s mostly

Wonder what I'm doing wrong then!?!

September 17, 2018, 05:53 PM

JRAMER

What are camshaft specs?

September 18, 2018, 05:46 AM

Mike Frizie

900, 855. 282,292 with a 113 centerline

September 19, 2018, 07:23 AM

gxp7903

A friend made a time run in my car when I had to work last year with 582, he was 80lbs heavier. it was .08 slower. I was 1860 lbs with the 582. 1880 with 632 without the bottle.