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SRH 2892

General engine tech -- Drag Racing to Circle Track

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408 Nova
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SRH 2892

Post by 408 Nova » Sat Aug 31, 2019 2:46 pm

I may have asked this already, so don't dog me out too bad if I have.


I have a bracket 434 SBC shifting at 7000. It has stock Dragon Slayer heads on it and a 261-268 at .050" solid roller cam in it, with 12.5:1 compression, 1 7/8' headers, and running on VP 113.

It has a stock 2970 and a stock 1050 Dominator on it. It runs pretty good with that setup on it.

I have a fully ported SRH 2892 for a different engine that has had the works in terms of heat barriers and oil shedding coatings and all that done to it, and a vey nice 950 4150 carb.


Would it be worth it to try the fully ported 2892 over the stock 2970?

Outlaw383
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Re: SRH 2892

Post by Outlaw383 » Sat Aug 31, 2019 5:28 pm

I would deffinently give it a try.

midnightbluS10
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Re: SRH 2892

Post by midnightbluS10 » Mon Sep 02, 2019 3:06 am

Did you at least ask Chad? He knows his products better than anyone and could tell you what to expect, I'm sure. I assume that's what SRH means, anyway.
JC -

Outlaw383
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Re: SRH 2892

Post by Outlaw383 » Mon Sep 02, 2019 3:19 am

Just out of curiosity 408Nova what kind of ET are you running with those heads and at what weight?

408 Nova
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Re: SRH 2892

Post by 408 Nova » Mon Sep 02, 2019 10:07 am

midnightbluS10 wrote:
Mon Sep 02, 2019 3:06 am
Did you at least ask Chad? He knows his products better than anyone and could tell you what to expect, I'm sure. I assume that's what SRH means, anyway.
Great suggestion.
It is Chad Speier's work, and he did a great job by the looks of it. It's burr finished.


Outlaw383 wrote:
Mon Sep 02, 2019 3:19 am
Just out of curiosity 408Nova what kind of ET are you running with those heads and at what weight?

5.80's at 116 at 3090 lbs in the eighth mile. There might be a little more in it because it's a little lean and no timing loop has been done yet.

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Re: SRH 2892

Post by Outlaw383 » Mon Sep 02, 2019 1:47 pm

Nice ! Sounds like a fun ride.

steve316
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Re: SRH 2892

Post by steve316 » Thu Sep 05, 2019 7:27 am

5.80's at 116 @ 3090 would take 775 hp I would't think there is anything left on the table.

WeingartnerRacing
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Re: SRH 2892

Post by WeingartnerRacing » Thu Sep 05, 2019 10:06 am

Probably see minimal change either way you are maxing out the stock heads.
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408 Nova
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Re: SRH 2892

Post by 408 Nova » Wed Sep 11, 2019 6:08 pm

steve316 wrote:
Thu Sep 05, 2019 7:27 am
5.80's at 116 @ 3090 would take 775 hp I would't think there is anything left on the table.
I'm thinking this thing would be very lucky to have 600 hp steve316? And that is on a good day. The engine was in an S-10 that weighs 2820 with a full fuel cell and I weigh 270.

It's going in a 68 Nova that weighs 100 lbs less. Maybe that will help it ET a little better.

408 Nova
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Re: SRH 2892

Post by 408 Nova » Wed Sep 11, 2019 6:09 pm

WeingartnerRacing wrote:
Thu Sep 05, 2019 10:06 am
Probably see minimal change either way you are maxing out the stock heads.
I'd like to get the heads and intake out your way this winter to help them out some.

Orr89rocz
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Re: SRH 2892

Post by Orr89rocz » Thu Sep 12, 2019 7:34 am

408 Nova wrote:
Wed Sep 11, 2019 6:08 pm
steve316 wrote:
Thu Sep 05, 2019 7:27 am
5.80's at 116 @ 3090 would take 775 hp I would't think there is anything left on the table.
I'm thinking this thing would be very lucky to have 600 hp steve316? And that is on a good day. The engine was in an S-10 that weighs 2820 with a full fuel cell and I weigh 270.

It's going in a 68 Nova that weighs 100 lbs less. Maybe that will help it ET a little better.
Wallace has it at 625-650... that seems more realistic

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Re: SRH 2892

Post by steve316 » Thu Sep 12, 2019 9:01 am

My guess may have be off at 775; so I went to wallace 1/8 mile cal. and it had it at 762.

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Re: SRH 2892

Post by CGT » Thu Sep 12, 2019 9:16 am

Maybe I'm missing something here. Even 600 "observed" would take a world class car and effort to run those ET's at 3090. I agree with it likely being around 580-620hp(corrected) engine by looking at the sum of the parts. But I just don't see that running 5.80's at that weight. Maybe I need to reread.
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Re: SRH 2892

Post by Orr89rocz » Thu Sep 12, 2019 10:10 am

Na car will run 22-25 mph out the back door over 1/8 mph, if geared for it.

140 mph traps at 3090 weight is 650 hp.

Wallace 1/8 calc is off imo for a na car. I think its assuming much more gain in mph in the top end if you compare 1/4 calc to the 1/8. For my turbo car that gained 35 mph on the back end, its pretty close

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Re: SRH 2892

Post by rewguy » Thu Sep 12, 2019 1:42 pm

Can I ask what gear, converter, trans, and finish line cross rpm it has currently? Thats impressive....

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