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SVTPerformance's Chain of Restaurants
Road Kill Drive-Thru
GTO Dreams of a kill
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<blockquote data-quote="50 BMG" data-source="post: 2669125" data-attributes="member: 16523"><p>The fastest "LS1" (if you can even call the engine I'm referring to an LS1) is turbocharged and run's 6.9's. 352 CID I believe.</p><p></p><p>Lingenfelter is good enough. He personally ran 6.9 @ 200+ in a 2.2L turbocharged DOHC GM engine before he died. They knew/know their shit better than any, whether it's on the street or dedicated to the strip.</p><p></p><p>Gains (if even applicable) from other people are minimal; I'm comparing <em>retail</em> kits available to Joe Public and intended for street use. If you want to compare custom kits...2 words for you: INDUCTION CONCEPTS. </p><p></p><p></p><p></p><p>Among factory spec'd engines available right now Ford vs. Chevy...yes that is correct. </p><p></p><p>With the same amount CID on both engines and both being NA, DOHC will make more power. I've lost count how many ways that has been proven in this thread now.</p><p></p><p></p><p></p><p>No, not very similar. You sure do like my one liners, here it is again.</p><p></p><p>Do the math :lol1: </p><p></p><p>Methanol = C12. So the fact that this car was on C14 is moot.</p><p></p><p>Take a look at my quote again:</p><p>830 rwhp @ 13.6 PSI on C14 </p><p>891 rwhp @ 16 PSI on C14 </p><p>990 rwhp @ 20 PSI on C14 </p><p></p><p>That car I quoted above put down 100 rwhp in a 4 PSI gap, or 25 rwhp per PSI in that range. Add another 3 PSI and that car would put down 1065 rwhp. That's over 150 more horsepower @ the wheels than the LS1 you posted @ 23 PSI. Nevermind the difference in cubes...</p><p></p><p>As far as the 9 PSI cars you're quoting...again, as I said 3 pages ago, I've seen a 5.4L DOHC in a 2000 R Cobra that puts down over 700rwhp @ 9 PSI on a single turbo. </p><p></p><p>BTW, cobra R spec 5.4 only has 80 more horsepower at the flywheel than the navigator 5.4 spec engine. </p><p></p><p>Kinda like a LS1 vs a LS6 no? See why I brought the navigator engine up now? It's our hotter cam/better intake/better head version over the standard, just like the LS6.</p><p></p><p></p><p></p><p>SHM = aftermarket. Factory 5.0 makes very conservative 425 @ crank. If you're not aware, this is an example of conservative to ford: 04 Cobras are factory rated @ 390 flywheel but put down an average of 370 rwhp.</p><p></p><p></p><p></p><p>Prove it.</p><p></p><p></p><p></p><p>Ya, I already answered your question. I don't dodge questions. Your question was how much could you stroke a 4.6L. The answer, for all intensive purposes, is 5.0</p><p></p><p></p><p></p><p>I've already told you, you can bore and stroke a OHC engine the same as a pushrod.</p><p></p><p>This now 43 year old production engine is based on a production 427 high riser short block. It would super safely bore/stroke to 520 CID. I doubt anyone even bothered cause it NA stomps the shit out of everything right out of the crate. On FI, same story...all on carburation I might add.</p><p><a href="http://www.me.mtu.edu/~prater/cammer.html" target="_blank">http://www.me.mtu.edu/~prater/cammer.html</a></p><p></p><p>Dodge also was producing a 426 hemi DOHC in 1965 (project A-925). It too was DOHC on a production 426 hemi short block. Dodge scrapped it after pushrod hosers bitched about the massive amounts of power the 427 SOHC was making in NASCAR. Dodge never even got to run the engine on it's own power. Very few people even know about it, search around about it on your own. Dodge only made 2 of them, 1 still exists and I believe is housed in the Garlits drag racing museum. The Dodge DOHC engine would have made a shitload more power than the Ford SOHC engine, which is still to this day, 40+ years later, is the most powerful crate engine ever released for a car in the US.</p></blockquote><p></p>
[QUOTE="50 BMG, post: 2669125, member: 16523"] The fastest "LS1" (if you can even call the engine I'm referring to an LS1) is turbocharged and run's 6.9's. 352 CID I believe. Lingenfelter is good enough. He personally ran 6.9 @ 200+ in a 2.2L turbocharged DOHC GM engine before he died. They knew/know their shit better than any, whether it's on the street or dedicated to the strip. Gains (if even applicable) from other people are minimal; I'm comparing [I]retail[/I] kits available to Joe Public and intended for street use. If you want to compare custom kits...2 words for you: INDUCTION CONCEPTS. Among factory spec'd engines available right now Ford vs. Chevy...yes that is correct. With the same amount CID on both engines and both being NA, DOHC will make more power. I've lost count how many ways that has been proven in this thread now. No, not very similar. You sure do like my one liners, here it is again. Do the math :lol1: Methanol = C12. So the fact that this car was on C14 is moot. Take a look at my quote again: 830 rwhp @ 13.6 PSI on C14 891 rwhp @ 16 PSI on C14 990 rwhp @ 20 PSI on C14 That car I quoted above put down 100 rwhp in a 4 PSI gap, or 25 rwhp per PSI in that range. Add another 3 PSI and that car would put down 1065 rwhp. That's over 150 more horsepower @ the wheels than the LS1 you posted @ 23 PSI. Nevermind the difference in cubes... As far as the 9 PSI cars you're quoting...again, as I said 3 pages ago, I've seen a 5.4L DOHC in a 2000 R Cobra that puts down over 700rwhp @ 9 PSI on a single turbo. BTW, cobra R spec 5.4 only has 80 more horsepower at the flywheel than the navigator 5.4 spec engine. Kinda like a LS1 vs a LS6 no? See why I brought the navigator engine up now? It's our hotter cam/better intake/better head version over the standard, just like the LS6. SHM = aftermarket. Factory 5.0 makes very conservative 425 @ crank. If you're not aware, this is an example of conservative to ford: 04 Cobras are factory rated @ 390 flywheel but put down an average of 370 rwhp. Prove it. Ya, I already answered your question. I don't dodge questions. Your question was how much could you stroke a 4.6L. The answer, for all intensive purposes, is 5.0 I've already told you, you can bore and stroke a OHC engine the same as a pushrod. This now 43 year old production engine is based on a production 427 high riser short block. It would super safely bore/stroke to 520 CID. I doubt anyone even bothered cause it NA stomps the shit out of everything right out of the crate. On FI, same story...all on carburation I might add. [url]http://www.me.mtu.edu/~prater/cammer.html[/url] Dodge also was producing a 426 hemi DOHC in 1965 (project A-925). It too was DOHC on a production 426 hemi short block. Dodge scrapped it after pushrod hosers bitched about the massive amounts of power the 427 SOHC was making in NASCAR. Dodge never even got to run the engine on it's own power. Very few people even know about it, search around about it on your own. Dodge only made 2 of them, 1 still exists and I believe is housed in the Garlits drag racing museum. The Dodge DOHC engine would have made a shitload more power than the Ford SOHC engine, which is still to this day, 40+ years later, is the most powerful crate engine ever released for a car in the US. [/QUOTE]
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