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Tiger Head Tiger Head owners can give there opinions along with their track results

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Old 05-29-10, 07:43PM   #16
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Quote:
Originally Posted by Bob Scarborough View Post
if it's truly streetable on pump gas, then let's see it run for 20 minutes at WOT at the local circle track, in traffic with 15 other SBC "street stock" powered cars, that have 9:1 and 2bbl carbs, turning 7500 rpm- this summer in 95 degree heat and high humidity. The big Pontiac would not last on pump gas- it would break.

big difference, dyno vs. in an actual car

dyno runs are made with no thermostat, the engine just reaches 160 degrees, and the pull it made. The engine is at WOT for about 3 seconds then shut down. The engine has its own dedicated cooling tank and electric water pump. The dyno room is climate controlled, with huge wall fans that pull air/fumes out of the dyno room- and ceiling vents to send in fresh air.

the engine is cooled down, jet/timing changes made, and another pull is done at 160 degrees

not real world testing at all

in the car, the engine is in a cramped engine compartment, has a hot transmission bolted to it, hood covering it, hot pavement reflecting upwards, has to haul around 3800 lbs. Then it has to sit in traffic waiting for red lights to change green. This whole thing is baking in 95 degree summer sun, and humid. Even with a good cooling system, the engine will run at 185-200 degrees or more.

then hit it WOT with 36 degrees timing, it will rattle like a machine gun

that type of "street" engine came into vogue, because it sells engines with a big HP number on the dyno, and backs it up with 1/4 e.t. at the track with the 900 HP on race fuel. But you'd better be running race fuel at the track- because there's a big difference between a 3 second WOT dyno run, and doing a burnout/stage, then 9 second WOT run at the track. The extended WOT time and heat, wil push the 11:1 engine into detonation on 93 octane fuel. Back out the timing, and you no longer have 900 HP.

it's really a 2-fuel engine. Pump gas for part throttle, race fuel for WOT racing.
You need to get out in the real world more. No one making that kind of power on pump gas is running 36 degrees of timing, if you get the cooling system right it will run all day with no problem. Also when was the last time you had your street car at WOT for 20 min?? Who does that?
By the way 889hp pump gas engine makes peak power with only 28 degrees of timing.
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Old 05-29-10, 08:41PM   #17
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Old 05-29-11, 09:24PM   #18
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And my 541 made 937 on pump gas with 29 degrees timing on Exxon 93 with no signs of detination.
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Old 05-29-11, 09:36PM   #19
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Detinition or Detonation,What was dynamic compression ratio and static comp ratio.Bill C.
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Old 05-30-11, 11:11AM   #20
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If your refering to me Bill im not sure.The motor is 11.1 cam is 276/280 on a 114 with 150 psi cranking.
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Old 05-30-11, 12:11PM   #21
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Dying to see how you make out with your motor in Calvin car, I know it'll take some runs to get everything sorted out.
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Old 05-30-11, 03:17PM   #22
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Quote:
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Dying to see how you make out with your motor in Calvin car, I know it'll take some runs to get everything sorted out.
X2

I seen it @ Calvin's shop a couple weeks ago when I picked up my stuff. Should run really good, keep us updated.


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Old 05-30-11, 06:49PM   #23
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Ventura541,your static comp ratio and cam specs are almost same as ours,we see no problem with 93 octane and sharp tuner.Bill C.
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Old 05-30-11, 11:37PM   #24
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Greg called me this morning they were heading to the track today for tt.
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Old 05-31-11, 01:16AM   #25
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Greg called me this morning they were heading to the track today for tt.
Any results...I know it's for some shake down runs.
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Old 06-06-11, 03:38PM   #26
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Greg lost his motor not sure how bad yet..
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Old 06-07-11, 01:05AM   #27
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Greg lost his motor not sure how bad yet..
Greg didn't lose his engine, he knows where its at. He did lose some horsepower and can't find them. LOL
It has some issues that need to be worked out but he will and he will be back trying to hang with me in no time.
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Old 06-07-11, 01:21AM   #28
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Greg lost his motor not sure how bad yet..
Lost his motor as in blow the motor up ?
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Old 06-07-11, 01:45AM   #29
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Lost his motor as in blow the motor up ?
Yes Sir not sure on how bad .. Greg is pulling it on Saturday.
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Old 06-07-11, 12:27PM   #30
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Lost his motor as in blow the motor up ?
He has some toasted bearings, it still turns over so nothing is broke. I would guess either the thrust bearing is out of it or there is a chance the oil pump pick up might of came off. He also has a carb/electrical/ignition issue of some sort as some of the plugs are crazy block and don't really look like they were firing. Greg "the pump gas king" will get it all worked out.
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