The only 300 mph six cylinder that I know of is a US made truck 302 GMC. Speaking of GM they are currently making a twin cam 4 valve six cylinder inline engine for trucks. However none of those engines with the exception of the 300 mph GMC are at all Traditional HAMB type engines.
Chevrolet "Vortec" (Atlas) 4200 (4.2 liter) DOHC 4 valve L6. http://en.wikipedia.org/wiki/GM_Atlas_engine The record for HP per cubic inch normally aspirated was set in the 1930s and has never been beat. And what engine is that?
Back in the late 60s my buddy and I ran a 55 Chevy Pickup gasser that had a Kay Sissell prepared 292 six that he had shipped from California (his Dad was a crazy indulgent oil man) we had it in the 12s and it would beat my 327 55 Chevy...smokin for 1967...
The record for HP per cubic inch normally aspirated was set in the 1930s and has never been beat. Current F1 power levels are 750 hp from 146". That's 5.1 hp per cubic inch. What beat that in 1930s?
If you don't want to change engines, and are a good welder, you can do what I did for about $200 and some junkyard parts. Really pisses a lot of people off too! If you have poor intake breathing, use a turbo..... See my websites for some giggles.
The record for HP per cubic inch normally aspirated was set in the 1930s and has never been beat. Current F1 power levels are 750 hp from 146". That's 5.1 hp per cubic inch. Ya know I did not realize they were not turboed and there was a turbo ban in effect but I went and did some quick research. I stand corrected. I didnt realise Millers record had been broken. My apology. I WAS WRONG! Never took the time to find out i guess. I have a cousin in law (married to my distant cousin) who works at BMW MunchenWerks as a Formula1 engineer. I should spend more time talking to him. He told me one thing though that I printed and framed and put on my shop wall. "A little bit more is always possible" I guess he really meant that! A really intersting six is Tom and Leighton Drake's in their early Simca gasser. It is a slant six efi turboed done in old school gasser style. I think it is currently turning 9.35s in the 1/4 and i believe the car weighs 2400 pounds. There is a video on Utube . I searched Simca Slant six. I believe if I read correctly the engine and even cam are basically stock with a bit of head porting. Even stock cast piston so he tells on one website. All the power comes from the turbo and efi. Might not be everyones cup of T but it is very interesting on just what can be done . The craftsmanshp on this car is phenominal. Don
Ha! thank you.. man it was buggin the hell out of me.. I was cleaning out the 300 six drag motors my dad gave me and could not remember for the life of me what name was on the bare head that was wrapped up.. it was Sissell. Name was stamped in it.. should get a pic of that for the hell of it.. Anyway.. I agree what the guys are saying as far as clifford or ford 6 sites.. lot of guys are doing great hop ups for the ford sixes,big or small,anything from fuel injection to alumn heads for em .as well as others.. and they would be the ones to give you the best info. Nothing wrong with doing up a 6.. if its there and runs then why not give it alittle pep.. yes there are other ways to get more hp with different motor combos.. but sometimes ripping out what you have and redoing something else to put in it isnt an option..
Unless its stuff Malcolm Campbell did with the Roll Royce "R" engine in that time, I have a feeling your going to tell us anyway!
Actually, Suzuki has the record for highest power to displacement ratio from their 3 cyl. 50cc naturally aspirated 2-stroke GP engine in the late 60s. They got around 19-20 HP at around 18000RPM from that little guy and that works out to 6.6 HP per cu. in. The funny thing is that the engine was designed like the Ariel Square4 but one of the cylinder positions was the magneto and the other three were the pistons. Too bad it never raced because of some legislation that banned any 50cc engines over 2 cylinders. Not really this place's cup of tea but still very interesting to engine guys. It had a 14 speed tranny too, those were the days Mike
30 years ago i was running a 270 GMC with twin Corvair turbos. Got them from junkyards cheap. Cheapest was $19. Most expensive cost $150. Some exhaust tubing to make manifolds. A junkyard Holley 780. Moon (Potvin) cam and cast Jhans pistons and we were off. Jimmie ran a best of 177 on gas in 1980. Whole car and trailer cost $4400 on the salt. Actually the GMC went 202 later in a streamliner and with a 12 port head.
Here are some pics of the engine I will be using this year. I fired it up yesterday. I plan to run it in a week or so.
The DeCell Altered T roadster with 300 cu in Ford six was running I believe in the high 8's in the late 60's . Good enough for Comp. Eliminator win at St. Jovit NHRA Nats. This was with the crossflow welded up Boss 302 head conversion.
How about another idea for good HP from a 6 banger.... In Australia you could get a Hemi slant 6. Correct me if I'm wrong but I think the top dog model was right around 300hp. There is a company that imports them to the US and for the money you'd have in building a 6 you could have one of those sent over...
Even better are the Japanese and European six cylinder in line engines. Fully forged bottom end, twin overhead cams, and four valves per cylinder and electronic fuel injection FACTORY STANDARD.
What era would these be found??? I can't imagine that being tech being found on any kind of early engine.
Better late than never. I just joined this morning 1/11/10. I am alive & well & living in Florida, thanks for the kind words in your post. Regards, Bruce
I dont know all details but I have seen a few 6's around here cranking it out. 1 was a chev coupe that is turbo charged running 10's a 60 falcon with a 261 variety , not sure whats in it but has 2 4bbls and supposed to run high 9's no adders. I know it runs in the 10's though . I saw an Altered run in the 8's with a 300 ford that had a couple cleveland heads chopped and sectioned in .
There are no disadvantages to running a six other than cubes. Enjoy. The engine doesnt know it is a six. It is six single cylinders and as long as each one s doing a good job it doesnt matter. V8 while they do have a bit of overlap it relates more to smoothness than power. You will notice our European friends and Friends down under are not burdened particularily with the V8 only concept. Even many of their real hot cars are inline sixes. The v8 advantage relates more to compactness and smoothness than anything else. Build a six , be different , have fun enjoy. I have recently a couple of years back helped a friend by doing a 250 chev for him to replace his Chev V8 in his 39 Chev street piece. He reports it is faster, better on gas and now peels rubbber on every shift. Also people now stop and look at it and ask questions. Before they got with in 15 feet and saw ANOTHER SBC and just turned and walked away. Now they spend time talking and are very interested. He is happy and so will you be. (yes I have one myself) Here in Moparland i have a rule. Inline 6 or 426. Real men only need a six to make power. If the opposite was true like everyone suggests then i am way ahead of you all with my v10 truck. I could say why would you want a V8 when you could have a V10. Then the jag guys would tell me why have a V10 when you can have a V12 ? Luckily the engines dont know all this BS and just work hard as we ask them to by the choice of cam compression and carb we choose. Many a six cylinder has laid a severe whipping on a V8 in the last 40 years or so. Dont be discouraged. The T bucket has a 300 Ford six I did for him. It ran from 1990 to 2008 and from 1993 to 2007 was in the top five at the local track every year. Won the whole shebang once and was in the top two or three several times. It is a mild 300 Ford. The others are mine. All the best, Don
I used to run a 300 ford 6 powered H/G Anglia in the late 60s prior to the hybrid cylinder head days which ruined the class. They had more money in the welded up Boss heads then I did in the whole car. Only problem I ever had was like Rich Fox mentioned, keeping the damn flywheel on it, tried saftey wire, loktite, dowels, bigger bolts, all of the above, even tacking the bolts to the flywheel. Never could figure it out, just made 4 runs then tightened it up for 4 more. There is definetly a harmonics deal going on there that you dont have with a V8. They didnt have the trick harmonic balencers back then so we ran it the only way we could. With 1 4 barrel you will always have fuel distribution problems but port injection would fix that. We ran a Holman Moody 4 barrel intake on the 300 six, yes they made them. Ran 11.50s then which isnt much now but it was then
http://www.youtube.com/watch?v=6eB3...B818DF918&index=1&playnext=2&playnext_from=PL http://www.youtube.com/watch?v=5JzhVTreyAI http://www.youtube.com/watch?v=isq9LZyPgzU
have a lot of room, big radiator, and heavy front end want excessively large I6 gas motor Mack 707 cu.in.
save some money for the transmission....proper gearing can keep your engine in its powerband, and multiple its output. consider those old commercial trucks with factory small displacement engines yet could pull a load up a hill. It wasn't an automatic (pun intended) replacement for displacement, but it does help...
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