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With bump port 30 psi all others 35 psi new Kirby-Sissell will be 35+.
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With bump port 30 psi all others 35 psi new Kirby-Sissell will be 35+.
Now I know why I still use carbs !!!
Last edited by Turbo-6; 12/07/13 12:30 AM.
Turbo-6
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With bump port 30 psi all others 35 psi new Kirby-Sissell will be 35+.
Now I know why I still use carbs !!!
Thanks Turbo-6 I had thought you needed to run 10 psi more with the Brazilian 12 port to make the same power as the Siamese port head? Or was it the divided Siamese head needed 10 more PSI to make the same power as compared to an undivided head? I believe it was the last question I posted is correct. MBHD
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With bump port 30 psi all others 35 psi new Kirby-Sissell will be 35+.
Do you need vendor info for a engine diaper 
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Mighty6, don't be afraid to turn up the boost. You have the better stronger block to start off with. So your front drivers side of the block should not come apart like it did on Douglas' Opala I think your turbo is supposed to be more efficient running 25 + PSI, no? I know your rods are the only thing holding your engine back, just saying, crank that bad boy up when your ready.  MBHD
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You have the better stronger block to start off with. So your front drivers side of the block should not come apart like it did on Douglas' Opala
MBHD There is no "better" block at this level of power other than a billet one!
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[quote=CNC-Dude #5585
There is no "better" block at this level of power other than a billet one! [/quote]
Just not sure what is the limit of a cast iron 292 block is?
Mighty 6's 292 does not have doweled main caps or main straps, or main girdle, or billet main caps.
MBHD
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Others have split blocks right down the center between the cylinders with a lot less HP and N/A, so he is probably 200 HP past what is safe and is living on borrowed time. When an engine failure like this occurs it is violent, and people get hurt, not usually the ones driving the car either.
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Turbocharging an engine is a little bit easier on engine components in general. But when the tune is off on a turbocharged engine, the pistons go away fast.  From what I hear, Guys in Brazil are running 1000 HP on 250 blocks, & those are weaker blocks. I have not heard what a turbocharged 292 block can handle. Only heard of 250 turbocharged blocks failing after 1000 & up HP range. Douglas' 250 block failed before the finish line & ran a 8.2 @ 165 MPH Don't recall the HP his engine was making @ that time. The last record ET for that 250 class was 7.8 seconds, that was done a few years ago, maybe there is a newer record? MBHD
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The 250 blocks are probably stronger because they are more rigid and shorter, making them less likely to flex, plus having 3/4" less stroke reduces a lot of block stress. High boosted engines are much more abusive to components than you think, they have much more cylinder pressure than you can ever make with a N/A engine, and that is what tries to split the blocks apart. These engines are weak between the cylinder because of a relatively large bore and close bore spacing, so there isn't much meat between them in the front to back relationship, plus having a thin deck doesn't give them much strength. Harry's 292 is a good example of that.
The HP potential obtainable today exceeds what a stock block can handle, there have been many block failures to show that is a fact. You wouldn't use a 1966 Chrysler Hemi block to build a 8000 HP Top Fuel motor. The warning signs are waving all around, luckily no one has gotten hurt yet, but keep throwing the gas on the fire and someone will.
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Mighty6,Do you know who sell OE Number turbocharger 171077 GM-1 ，Tell me the website, I went to consult.
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MIGHTY6,Do you know who sell OE Number turbocharger 171077 GM-1.Tell me the website, I went to consult
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MIGHTY6,Do you know who sell OE Number turbocharger 171077 GM-1.Tell me the website, I went to consult
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To run a 7.8 ET @ 2500 lbs you need 1042 HP this is what Douglas's car weighed
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To run a 7.8 ET @ 2500 lbs you need 1042 HP this is what Douglas's car weighed Thanks for that Harry. Not saying that is what he ran,, but,, IIRC,, he did say it was on a 7.8- 8.0 ET pass when the engine failed. MBHD
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He needs to call LSM for his next block. He might not be so luck the next time it happens.
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Douglas' next engine is/was supposed to be N/A, 292. Not sure the status of if it ever happened.
Last I heard it was supposed to be a 700 HP N/A engine.
Need to contact him or he might chime in here.
MBHD
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He needs to call LSM for his next block. He might not be so luck the next time it happens. You remind me of a guy on this forum "LEELITES" that would always come on here selling that Joe Deppe propaganda. That was about 15yrs ago.
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What was the Joe Deppe propaganda he was trying to sell.
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Others have split blocks right down the center between the cylinders with a lot less HP and N/A, so he is probably 200 HP past what is safe and is living on borrowed time. When an engine failure like this occurs it is violent, and people get hurt, not usually the ones driving the car either. I guessing your referring to Rob Harrison on splitting blocks. I don't know him nor never talked to him but he's performance goals are way different than ours. I think he was using one of them junky Deppe blocks. We have heard of LSM and also heard the company went down hill when the son took over the business. My brother has Haas machining center that can handle a block no problem. Why, he's figures out a system to blocks together at 1000 whp. Why do we need to spend $20,000 on a block when the crank might be the weakest link? O-hhh hell lets put a $5,000 crank with a jesal drive, reverse driven cam too bam $40k! We've torn up more stuff n/a and n2o making way less power than this boosted combination. One of the keys is in the tune up and is solid. If we blew it up next month we would build another one just like it. And yes our motor has a crack in it just like Harrys did. We've been running it for 3 years that way so it looks like the retention device works. Thank you for your concern
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Douglas' next engine is/was supposed to be N/A, 292. Not sure the status of if it ever happened.
Last I heard it was supposed to be a 700 HP N/A engine.
Need to contact him or he might chime in here.
MBHD I think the guy that bought douglas car fixed the head and putting it back together but I could be wrong.
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Others have split blocks right down the center between the cylinders with a lot less HP and N/A, so he is probably 200 HP past what is safe and is living on borrowed time. When an engine failure like this occurs it is violent, and people get hurt, not usually the ones driving the car either. I guessing your referring to Rob Harrison on splitting blocks. I don't know him nor never talked to him but he's performance goals are way different than ours. I think he was using one of them junky Deppe blocks. We have heard of LSM and also heard the company went down hill when the son took over the business. My brother has Haas machining center that can handle a block no problem. Why, he's figures out a system to blocks together at 1000 whp. Why do we need to spend $20,000 on a block when the crank might be the weakest link? O-hhh hell lets put a $5,000 crank with a jesal drive, reverse driven cam too bam $40k! We've torn up more stuff n/a and n2o making way less power than this boosted combination. One of the keys is in the tune up and is solid. If we blew it up next month we would build another one just like it. And yes our motor has a crack in it just like Harrys did. We've been running it for 3 years that way so it looks like the retention device works. Thank you for your concern Well, that's all it is!. And, please don't ever compare anyone to "LeeLites", those are fighting words in most English speaking countries.(LOL) The envelop is definately being pushed with stock blocks and cranks and nobody likes to see others get hurt when things go bad. Just stay safe and race smart.
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Douglas' next engine is/was supposed to be N/A, 292. Not sure the status of if it ever happened.
Last I heard it was supposed to be a 700 HP N/A engine.
Need to contact him or he might chime in here.
MBHD I think the guy that bought douglas car fixed the head and putting it back together but I could be wrong. Douglas had told me he sold the Yellow Opala as just a rolling chassis, no engine, no head. Douglas said to me he kept the 12 port Kirby head & had it welded back together & he had sent me some pics of the repair, also pics of the broken head. Crack right in the middle of the head. His engine failure was very violent. He was going to try & put it onto another vehicle, but who knows what happened? MBHD
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[quote=MIGHTY6
We've torn up more stuff n/a and n2o making way less power than this boosted combination. One of the keys is in the tune up and is solid. If we blew it up next month we would build another one just like it. And yes our motor has a crack in it just like Harrys did. We've been running it for 3 years that way so it looks like the retention device works.
Thank you for your concern [/quote]
That is the statement I had posted earlier. Running a turbocharged engine is a bit easier on engine parts.
Part of the reason I suggested for you guys to try out turbocharging because of all the engine failures, hard launches w/N2O, breaks parts, & looking back @ your old vids of nitrous launches all looked to be wild rides.
Mighty 6,
where exactly is your engine cracked?
Also, what is this retention device?
MBHD
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And, please don't ever compare anyone to "LeeLites", those are fighting words in most English speaking countries.(LOL) Indeed . . . Lee is an infamous part of inliner's BB nostalgia . . . and there was nothing like spectating when Jack Halton would step in as moderator and take "mr. leelites" to the woodshed for posting unsubstantiated bombast . . . Back then we could have used a separate forum just for Lee - it could have been called "Flow Bench Racing" . . .
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Its a shame too, Lee is an OK guy to talk to on the phone, but when the topic moves to car stuff, he quickly reminds you of the guy at a party that has a few drinks and turns into the ass no one wants to be around.
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Gentlemen-
Let's keep this forum as a vehicle to share information and ideas.
"Leelights " is past history, let's let it lie.
Thank you.
Will Willis
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He may be history but he posted the best side by side photos and casting numbers of all the 230,250,292 cranks on this board that I have seen the 10 years I have been on it.I call that sharing infomation.... That said i did get tired of the pissing matches about who's lumps were best. Truth being there isn't a 100th. on the clock differents between the lot. Now my rant is over I DEFER to the guys on this thread who are running the numbers. They are the ones with the time cards.
Last edited by SCRAPIRON, #4711; 12/20/13 11:06 PM.
Jerry Davis II#4711
ol Smokey said "one test is worth a thousand expert opinions."
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Merry Christmas back atcha. Although I think I'll pass on the other 3 posts. 
My, what a steep learning curve. Erik II#5155
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Let's focus on Turbo-6 build. Or 400 CFM 12 port head.
MBHD
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Turbo-6 , So what is the latest with this new combo?
MBHD
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Hank, Been beating a dead horse with my new set up, changed the converter and went from a 9.45 to 8.84 at 150+ MPH.
Have a high speed shake I have to fix and install a parachute now.
But happy with the results of an old school blow through carb.
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Harry,
That is awesome & congrats BTW! About your ET & MPH.
What boost pressure did you run with that ET?
MBHD
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Hank, Been beating a dead horse with my new set up, changed the converter and went from a 9.45 to 8.84 at 150+ MPH.
Have a high speed shake I have to fix and install a parachute now.
But happy with the results of an old school blow through carb. Welcome to the 8's. We had a high speed shake for the longest time and it drove us crazy trying to find it. It ended up being those early drag lite wheels. Craig made a fixture so when we balanced them it simulated them being on the truck. We run Champion Bead locks now with "0" issues. Take a look at that.
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So your problem was on the REAR wheels! that's good to know .
With the new set up I changed the motor angle, just changed it back maybe this will fix the problem. If not, will look in to the wheels for sure, what was the fixture for and how did it work?
Thanks
Harry
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