BIG shout out to jmarkaudio on my 1050 conversion!!

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Carnut1
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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby Carnut1 » Thu Jun 01, 2017 9:16 am

Sounds snappy, exactly the way a smallblock with a 1050 should sound.

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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby af2 » Thu Jun 01, 2017 9:45 pm

GARY C wrote:Jmark has come up from 3 different people in conversations over the past few years all very happy customers.


Gary there is way more people happy with him..... Add me!!
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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby af2 » Sun Jun 18, 2017 1:57 pm

Well we just got home after an awesome but very hot weekend in Sacramento. My son wanted to drive and get his licence passes so I let him even though he is still hurting. We made 4 - 1/8th mile passes at between 6.22 and 6.14 coasting to 10.30-10.20 at 98mph.His 5th pass we had to qualify for HR and decided to run it to just before the 1000' marker and it went 6.12 at 108mph and 9.75 at 120mph all with the track at between 130 and 138*. Took the car back and pulled plugs and installed new plugs for the 1st round of HR eliminations and dialed the car at 10.25 because we weren't allowed to go faster than 10.00. I figured we would let out 1/8th and coast just to see how the 1/8th time was not caring about the race.... Holy crap even with a 134* track the car went 6.04 at 111.99 and 10.16 at 98mph...
Mark Whitener is the man when it comes to Carbs. Never had to mess with jetting and the car is at least .4 faster and my son is sending in the papers tomorrow with all the signatures for his competition licence.....

We are happy campers!!
GURU is only a name.

Adam

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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby BrazilianZ28Camaro » Sun Jun 18, 2017 2:37 pm

af2 wrote:Well we just got home after an awesome but very hot weekend in Sacramento. My son wanted to drive and get his licence passes so I let him even though he is still hurting. We made 4 - 1/8th mile passes at between 6.22 and 6.14 coasting to 10.30-10.20 at 98mph.His 5th pass we had to qualify for HR and decided to run it to just before the 1000' marker and it went 6.12 at 108mph and 9.75 at 120mph all with the track at between 130 and 138*. Took the car back and pulled plugs and installed new plugs for the 1st round of HR eliminations and dialed the car at 10.25 because we weren't allowed to go faster than 10.00. I figured we would let out 1/8th and coast just to see how the 1/8th time was not caring about the race.... Holy crap even with a 134* track the car went 6.04 at 111.99 and 10.16 at 98mph...
Mark Whitener is the man when it comes to Carbs. Never had to mess with jetting and the car is at least .4 faster and my son is sending in the papers tomorrow with all the signatures for his competition licence.....

We are happy campers!!



I got it right? .4s improvement just converting to alcohol carb ? Wow!

Mr Mark is a PHD in carburation. =D> =D> =D>
'71 Z28 Pro-Street Camaro
Pump gas -T-ram - All motor SBC 427"
3308 lbs- leaf spring/Caltrac Car
28x10 Hoosiers
New best 1/8 mile ET
1.45 60' / 4.16 330' / 6.45@108.75mph

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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby af2 » Sun Jun 18, 2017 5:07 pm

BrazilianZ28Camaro wrote:
af2 wrote:Well we just got home after an awesome but very hot weekend in Sacramento. My son wanted to drive and get his licence passes so I let him even though he is still hurting. We made 4 - 1/8th mile passes at between 6.22 and 6.14 coasting to 10.30-10.20 at 98mph.His 5th pass we had to qualify for HR and decided to run it to just before the 1000' marker and it went 6.12 at 108mph and 9.75 at 120mph all with the track at between 130 and 138*. Took the car back and pulled plugs and installed new plugs for the 1st round of HR eliminations and dialed the car at 10.25 because we weren't allowed to go faster than 10.00. I figured we would let out 1/8th and coast just to see how the 1/8th time was not caring about the race.... Holy crap even with a 134* track the car went 6.04 at 111.99 and 10.16 at 98mph...
Mark Whitener is the man when it comes to Carbs. Never had to mess with jetting and the car is at least .4 faster and my son is sending in the papers tomorrow with all the signatures for his competition licence.....

We are happy campers!!



I got it right? .4s improvement just converting to alcohol carb ? Wow!

Mr Mark is a PHD in carburation. =D> =D> =D>


Diego maybe more when I get it figured out.....

I did purchase an aluminum block Thursday for the next build....
GURU is only a name.

Adam

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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby BrazilianZ28Camaro » Sun Jun 18, 2017 5:32 pm

God bless Alky!

What CR you have on that lil monster Adam?
'71 Z28 Pro-Street Camaro
Pump gas -T-ram - All motor SBC 427"
3308 lbs- leaf spring/Caltrac Car
28x10 Hoosiers
New best 1/8 mile ET
1.45 60' / 4.16 330' / 6.45@108.75mph

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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby af2 » Sun Jun 18, 2017 6:15 pm

13.4:1 measured.
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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby BrazilianZ28Camaro » Sun Jun 18, 2017 6:39 pm

af2 wrote:13.4:1 measured.


Nice CR, but I'm still amazed, Have you calculated roughly how much power is needed to gain .4s in the eight mile? I don't know about your car weight, but will guestimate 150-200HP improvement :D

Again, Impressive results, congrats =D> =D>
'71 Z28 Pro-Street Camaro
Pump gas -T-ram - All motor SBC 427"
3308 lbs- leaf spring/Caltrac Car
28x10 Hoosiers
New best 1/8 mile ET
1.45 60' / 4.16 330' / 6.45@108.75mph

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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby af2 » Mon Jun 19, 2017 10:23 am

.1 in the 1/8th .4 in the 1/4
Car with driver is 2300 lbs.
GURU is only a name.

Adam

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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby BrazilianZ28Camaro » Mon Jun 19, 2017 4:50 pm

af2 wrote:.1 in the 1/8th .4 in the 1/4
Car with driver is 2300 lbs.


Ok, got it now.
'71 Z28 Pro-Street Camaro
Pump gas -T-ram - All motor SBC 427"
3308 lbs- leaf spring/Caltrac Car
28x10 Hoosiers
New best 1/8 mile ET
1.45 60' / 4.16 330' / 6.45@108.75mph

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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby jmarkaudio » Tue Jun 20, 2017 6:40 pm

Glad to hear it's running well. A good gas carb would probably be closer, but in that ET/HP range alky usually will make a pretty decent improvement.
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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby speedtalk » Wed Jun 21, 2017 9:24 am

I'm a fan of jmarkaudio, but had to move your post to general

af2 wrote:Mark is truly a man of his word!! 1 week turnaround from CA to FL and back on my 1050 Holley methanol conversion. Included all the jetting I should need and is willing to provide support if needed.
Thank You, Adam
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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby Ken0069 » Wed Jun 21, 2017 7:47 pm

cgarb wrote:Make sure you have a lean out so you can get heat in the engine. Cold engine temps and Methanol make for milked oil and bearing failures. Other than that, alky is the only way to fly.


Sounds to me like you've been running fuel injection!!!

FYI, a "properly" setup idle circuit on a Dominator with Methanol WILL NOT milk the oil nor does it need a "lean out"!!! I ran a 1150 Dominator carb I built for methanol a few years back and ran the same oil in that 775HP 18* 434 SBC ALL SEASON! It was Mobile one VTwin 20w50 and I only changed it ONCE a year.

Your mileage may vary!
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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby af2 » Wed Jun 21, 2017 9:37 pm

After running this weekend the oil looks like it did when I changed it in April when running gas. This thing idles extremely well and responsive.
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Re: BIG shout out to jmarkaudio on my 1050 conversion!!

Postby cgarb » Thu Jun 22, 2017 11:18 pm

Well Ken define all season...one person's racing season may be a few outings and another may be 500 passes a year or more. I change my oil after every 55gals of fuel. Not because its milked and not any good, I just feel that's a good interval for me to measure by. George Ruepert sets up my carbs, they run well and are consistent. I use the leanout to save fuel on warmups. I do feel that getting heat into a motor fast is key to keeping condensation under control. My car does not have a vaccuum pump so it is a little more sensitive to condensation because the vac-u-pan set up don't do as good of a job pulling that off. Sure, I could warm up my car without a lean out but I would burn way more fuel doing it, I would rather spend my money racing not riding around in the pits.


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