Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

General engine tech -- Drag Racing to Circle Track

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by F-BIRD'88 » Fri Aug 18, 2017 10:24 am

Ok here is the Op post question:

PrairieHotrodder: How do you like this one?

;-)

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by prairiehotrodder » Fri Aug 18, 2017 10:56 am

Sweet motor. I wonder how much power the t-tam adds over a single 1050 dominator? I know those AED carbs are $999 each but are probably about some of the best you can get. Is the cam 263 / 265 @ .050 .706 / .693 108 ? That was the cam i had from Chris.
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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by F-BIRD'88 » Fri Aug 18, 2017 11:39 am

Build your own pair of 750 hp dp carbs
from 700-750-800 holley dp carbs + 2 x Proform 750 hp
carb body kits.

A fraction of the $$$ better result.

A great alternative is 2x eddy 750 afb's
simple, easy ,affordable, trouble free
Great streetability, only slightly less power
than full prepped Holleys. a lot less fuss.

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by F-BIRD'88 » Fri Aug 18, 2017 11:48 am

You will get a very similar net valve timing result by opening the lash setting on your Lunati cam.. (For track use only)
Run the lash tighter when on the street.
You can determine the max valve lash point of your cam
with a degree wheel and dial indicator, or just ask Lunati.
This makes the valve timing change.
Yup you should have kept that other roller cam too.
There is (some limited) adjustment room looser for less effective
valve duration.
The car will show what it likes...

but keep the lash a bit tight for street use.

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by Orr89rocz » Fri Aug 18, 2017 11:58 am

prairiehotrodder wrote:Sweet motor. I wonder how much power the t-tam adds over a single 1050 dominator? I know those AED carbs are $999 each but are probably about some of the best you can get. Is the cam 263 / 265 @ .050 .706 / .693 108 ? That was the cam i had from Chris.
It was 274/277 deg .750/.720

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by Keith Morganstein » Fri Aug 18, 2017 4:30 pm

Sure Mr. Straub is sharing and promoting what he does. Lots of people do that. However, I don't think he "crosses the line" of selling in a retail manner on the forum because he doesn't put links to items for sale or mention prices. He will answer questions and will provide some tech. Maybe not enough tech info for some people, but I don't see a problem.
Automotive Machining, cylinder head rebuilding, engine building. Can't seem to quit #-o

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by prairiehotrodder » Fri Aug 18, 2017 6:19 pm

In the OP its says 'AED's out of the box" . Are those the $999 AED's custom built for a t-ram? Or are they the more genric AED HO carbs that are much cheaper? Were they built for 2x4 application or modified later for 2x4 application?
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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by cab0154 » Fri Aug 18, 2017 10:19 pm

after rebuilding the aed HO series stuff I was surprised at how many differences there were in the base plate with original circuitry welded up and new stuff machined in. we have run these things OOTB on stuff with very little booster signal that new HP 4150s of the same size would run like crap with even after being tuned. not to mention I have gotten back from the races at as late as midnight central, emailed a tech question to AED and got an answer less than an hour later from John Dickey. So that was like after 2am his time. Cant beat that service. call the holley tech line and they are guessing.
"Anyone who thinks the low RPM engine will be faster just does not have as much experience as the rest of us" -The late, great Joe Sherman.

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by prairiehotrodder » Mon Aug 21, 2017 11:01 am

prairiehotrodder wrote:In the OP its says 'AED's out of the box" . Are those the $999 AED's custom built for a t-ram? Or are they the more genric AED HO carbs that are much cheaper? Were they built for 2x4 application or modified later for 2x4 application?
Just wondering because i see the AED carbs for sale for like $550 but when i emailed AED they wanted $999 each for a pair of t-ram carbs. Whats in a t-ram carb that makes it more money than a regular carb?
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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by statsystems » Mon Aug 21, 2017 11:41 am

prairiehotrodder wrote:
prairiehotrodder wrote:In the OP its says 'AED's out of the box" . Are those the $999 AED's custom built for a t-ram? Or are they the more genric AED HO carbs that are much cheaper? Were they built for 2x4 application or modified later for 2x4 application?
Just wondering because i see the AED carbs for sale for like $550 but when i emailed AED they wanted $999 each for a pair of t-ram carbs. Whats in a t-ram carb that makes it more money than a regular carb?

Because they require more tuning. They change emulsion, everything.

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by 67 Nova » Mon Jan 15, 2018 11:26 am

Racerrick wrote:
Thu Aug 17, 2017 10:29 am
Where is the question in OP post ??????. 99.9% of the threads on this forum are asking a question. Not serving an agenda and that is the point. Straub is selling his wares and thumping his chest. I find it annoying as this forum IS NOT for selling Straub cams, Morel lifters and Foxwell heads. He has been warned on the other forums for posts of this nature. For the parts used his motor is nothing special for a solid roller 555 with 2x750 carbs and ported heads just like the one I built for my customer. OP post belongs in the show and tell section.
See others are starting to see the "snake oil" salesman coming on here? I thought FOXWELL WORKS FOR STRAUB too, not separate identity or company........

As for this 555. Actually I thought it was an "ok" build, till I seen the tunnelram and then thought it was underachieving quite some. Didn't VortecPro do a 516 for a Chevelle with a hyd roller, pump gas cast single that made 896 @ 7100

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by NormS » Mon Jan 15, 2018 3:00 pm

Making 884HP on 600 CFM of air, and 950 HP worth of fuel(at .50 BSFC) ? The numbers don't add up. I notice that there are no Bsfc's on the dyno sheet. Is that intentional ?
The air flow can be explained if there was an airflow meter on just one carb. But how do you explain using 475 lbs/Hr fuel to make 884 HP. Not knowing what the atmospheric correction factor was at the time, makes it just a guess as to what the actual BSFC at peak power was. ?? .60 ??
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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by Newold1 » Mon Jan 15, 2018 4:14 pm

Dyno numbers are strange, short and missing a lot of relevant data and inputs, etc. Power numbers don't seem to unrealistic, but why is this being drug up now 5 months later??
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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by GARY C » Mon Jan 15, 2018 4:52 pm

NormS wrote:
Mon Jan 15, 2018 3:00 pm
Making 884HP on 600 CFM of air, and 950 HP worth of fuel(at .50 BSFC) ? The numbers don't add up. I notice that there are no Bsfc's on the dyno sheet. Is that intentional ?
The air flow can be explained if there was an airflow meter on just one carb. But how do you explain using 475 lbs/Hr fuel to make 884 HP. Not knowing what the atmospheric correction factor was at the time, makes it just a guess as to what the actual BSFC at peak power was. ?? .60 ??
Peak power is at .45/.46? at the end of the pull when the throttle is closing it jumps to .48 and 817 horse?
I have 2 dyno sheets both engines ran on the same dyno as each other that do the same but the duel plane spikes higher than the single plane and not all pulls do it, maybe the tunnel ram plays into fuel disturbance at throttle closing.
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THE ABOVE POST IN NO WAY REFLECTS THE VIEWS OF SPEED TALK OR IT'S MEMBER AND SHOULD BE VIEWED AS ENTERTAINMENT ONLY...Thanks, The Management!

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Re: Pump Gas 555 CID BBC, 10 to 1....Dyno 880 Plus...

Post by NormS » Mon Jan 15, 2018 8:35 pm

I dragged it up because nobody else did. When there is a lot of missing data on a dyno sheet, there is usually a reason. It's usually related to smoke and mirrors. There shouldn' be any data taken at the top end of a pull as the throttles are being closed. That data would mean nothing. The timing of ending data gathering should occur just before the start of throttle closing. If done this way, then the numbers mean something.
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