My other 632 with Brodix BB-5 heads was considerably faster with Sunoco Blue vs Sunoco Red.

Prefer Q16 above all on both 598 & 632. A little emulsion change and the BLP 5120 wide body metering blocks.Minor mods to the booster channel.

Best "Q16" Comes from the Airport

quote:

Originally posted by racerdude2054:
Which racing gas would you recommend: 632 cubic inch, head hunter 395 mc, 15.5:1 compression, 1150 horsepower. Car runs 4.50s to 4.60s in a 1900 pound dragster

Sunoco use the Supreme (Blue) It works up to 16 plus to 1. If you go above 16.4 or so then go to the Max (Red)

VP - C14 is a great fuel that's been around a long time but over priced IMO. X16 is what I would recommend.

At 15.5 to 1 Maximal and C16 are not the fuels for you.

I have used Sunoco Blue and VP X16 and find no difference in performance in both a 632 12 & 18 degree motors and also a 632 SR20 motor at 16 to 1 with an occasional shot of NOS.

quote:

Originally posted by TOP38:

quote:

Originally posted by racerdude2054:
Which racing gas would you recommend: 632 cubic inch, head hunter 395 mc, 15.5:1 compression, 1150 horsepower. Car runs 4.50s to 4.60s in a 1900 pound dragster

Sunoco use the Supreme (Blue) It works up to 16 plus to 1. If you go above 16.4 or so then go to the Max (Red)

VP - C14 is a great fuel that's been around a long time but over priced IMO. X16 is what I would recommend.

At 15.5 to 1 Maximal and C16 are not the fuels for you.

I have used Sunoco Blue and VP X16 and find no difference in performance in both a 632 12 & 18 degree motors and also a 632 SR20 motor at 16 to 1 with an occasional shot of NOS.

For what reasons would the c16 or maximal not be to correct fuel for a 15.5 to 1 compression ratio?

My 15-1 565 runs great on X-16 or Maximal. Sunoco is available almost everywhere and VP is not. I have also run Renegade 116 and Q-15 blend. The Q fuel is just to toxic for me and I can’t stand the stuff. Probably would gag a maggot at 50 paces......

quote:

Originally posted by racerdude2054:

quote:

Originally posted by TOP38:

quote:

Originally posted by racerdude2054:
Which racing gas would you recommend: 632 cubic inch, head hunter 395 mc, 15.5:1 compression, 1150 horsepower. Car runs 4.50s to 4.60s in a 1900 pound dragster

Sunoco use the Supreme (Blue) It works up to 16 plus to 1. If you go above 16.4 or so then go to the Max (Red)

VP - C14 is a great fuel that's been around a long time but over priced IMO. X16 is what I would recommend.

At 15.5 to 1 Maximal and C16 are not the fuels for you.

I have used Sunoco Blue and VP X16 and find no difference in performance in both a 632 12 & 18 degree motors and also a 632 SR20 motor at 16 to 1 with an occasional shot of NOS.

For what reasons would the c16 or maximal not be to correct fuel for a 15.5 to 1 compression ratio?

Too much octane and the burn rate is too slow for that combo.

quote:

Originally posted by racerdude2054:

quote:

Originally posted by TOP38:

quote:

Originally posted by racerdude2054:
Which racing gas would you recommend: 632 cubic inch, head hunter 395 mc, 15.5:1 compression, 1150 horsepower. Car runs 4.50s to 4.60s in a 1900 pound dragster

Sunoco use the Supreme (Blue) It works up to 16 plus to 1. If you go above 16.4 or so then go to the Max (Red)

VP - C14 is a great fuel that's been around a long time but over priced IMO. X16 is what I would recommend.

At 15.5 to 1 Maximal and C16 are not the fuels for you.

I have used Sunoco Blue and VP X16 and find no difference in performance in both a 632 12 & 18 degree motors and also a 632 SR20 motor at 16 to 1 with an occasional shot of NOS.

For what reasons would the c16 or maximal not be to correct fuel for a 15.5 to 1 compression ratio?

Too much octane and the burn rate is too slow for your combo.

Injection and Methanol. And then you don't worry whose alky you buy. But I understand that wasn't asked so I will slowly back away

I reckon one does not need a 7th grade English degree to a chemist at chevron? WOW!

quote:

Originally posted by 329L:
Injection and Methanol. And then you don't worry whose alky you buy. But I understand that wasn't asked so I will slowly back away

We have ran injection and alcohol for over 10 years, switching to gas

quote:

Originally posted by fasterat:
I reckon one does not need a 7th grade English degree to a chemist at chevron? WOW!

Only on an Internet forum can a guy whose user name is horseshoe and who states on his profile he's a horse trainer claim to be a chemist for a petroleum company. Hell if we've got some self proclaimed propulsion experts here that think they are rocket scientists, I guess there's room for a bar tender that thinks he's a chemist.

When you compare at the spec’s of VP and Sunoco you discover some interesting facts.

VP C-12 MON 108 RON 110 = 109 S/G .717

Supreme MON 109 RON 115 = 112 S/G .715

VP C-14 MON 114 RON 116 = 115 S/G .690

VP C-15 MON 115 RON 117 = 116 S/G .713

Maximal MON 112 RON 117 = 116 S/G .713

VP C-16 MON 117 RON 118 = 117.5 S/G .733

I have a 15.5:1 582 using conventional 24 degree cylinder heads. There was zero (performance) difference between the Sunoco Maximal and the VP C-15....the only difference was the cost. The VP was substantially more expensive.

Bob

This message has been edited. Last edited by: RPROGAS,

The 3 most consistent answers I am getting is

VP x16
VP c15

And

Sunoco blue (112)

With the sunnoco blue being 475 a drum

The VP x16 being 600

The VP c15 being 750

And most everyone seems to say those 3 fuels won't be any different in performance

I use C14 in my 15/1 HH 632.

I have a SBC, just under 15:1. Did a back to back test between Sunoco Blue and Red. Same day, within 1/2 hour of each other.

ZERO difference in ET and MPH.

I usually use Blue, but if they are out I can use Red.

The Red wants to run a little leaner than the Blue if you care to keep EGT's the same.

Not that this helps the OP with a BBC. But in my case, they are interchangeable.

I need to move to Georgia, $475 for a drum of Sunoco Blue, here it runs nearly $600 including Governor Moonbeams Sale Tax.

Bob

quote:

Originally posted by RPROGAS:
I need to move to Georgia, $475 for a drum of Sunoco Blue, here it runs nearly $600 including Governor Moonbeams Sale Tax.

Bob

Actually cheaper than that....

I have just recently read of s racer using late model plus I'm his aluminum 598 sr20. Said it was good for a few hp and ran cooler.

quote:

Originally posted by Matrix:
I have just recently read of s racer using late model plus I'm his aluminum 598 sr20. Said it was good for a few hp and ran cooler.

One of them is me...they are gonna call it X14...but I seen zero improvement...and like stated earlier at $200+ more per drum...IM OUT....