434 being built
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434 being built
Well, what began as a upgrade on the 351 in my truck which was going to be 400crank, Aussie heads, roller cam etc. has now morphed into a 434 with the 3V225 heads, CHI intake..in for a penny in for a pound..hehe. Tim Meyer has been nothing short of exceptional. The CR should be around 12.12:1, cam details will be worked out. The goal is for 91 oct at around 3300'. I will update as things progress.
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From: Sin City, USA
Where are you at? Canada?
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73XAFalcon...yes in Canada..Alberta
unrulee..thanks!..I'm looking forward to it
UTftball68..should be able to run 91 at our altitude...our bikes are 10.75:1 and you can get the odd ping if you lug 'em..so with the aluminum head and quench combo we figure it will be ok. Regarding the choice of heads...I have been down the path of "well we could do this...but this way would be better"...I don't want to get the engine done and then discover 6 months or a year later that I want more jam...it happened with the bikes, it happened with the Shelby..you know how it goes...and I might wind up doing a frame off on it, although the truck is in great shape..the thought of pulling the drivetrain out again after a year or two to do a resto doesn't really appeal to me.
unrulee..thanks!..I'm looking forward to it
UTftball68..should be able to run 91 at our altitude...our bikes are 10.75:1 and you can get the odd ping if you lug 'em..so with the aluminum head and quench combo we figure it will be ok. Regarding the choice of heads...I have been down the path of "well we could do this...but this way would be better"...I don't want to get the engine done and then discover 6 months or a year later that I want more jam...it happened with the bikes, it happened with the Shelby..you know how it goes...and I might wind up doing a frame off on it, although the truck is in great shape..the thought of pulling the drivetrain out again after a year or two to do a resto doesn't really appeal to me.
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From: Coal Country, ND
DNFX...sounds absolutely awesome, I'm hoping to have my TMI 434 for Red over Christmas...but I keep finding other rigs I want to hoard in my collection...haha. Man I can't wait to see some updates on this. You say you're gonna be able to run 91 octane? That's awesome. What made you decide to go with the 3vheads instead of a good 2v job?
Nice to see you back Ben.
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From: Coutts Canada
Where in alberta are you dnfxdli? (i'm in calgary and i've been racing as far north as rimbey) And what by chance would this be going into? Just curious, and it'll be interesting to see if you can get that to run on 91, i'm at a minimum of 11:1 compression and running 40deg advanced, it won't run on anything but 110, but then again its a race truck and i was expecting that.
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In Okotoks, it is going in a 1979 F150 4x4...I suspect the advance will be around 30 deg. Tim feels that the combination of aluminum/quench and altitude should be ok....when I did the bike engines I was concerned about that CR, but as I mentioned it has become pretty much a non issue and we are using an Alpha-N throttle position ECM as opposed to the factory ECM which had an ion sensor to take timing out. I'll be keeping my fingers crossed!
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From: Coutts Canada
Yeah keep me updated, hell i'll even lend ya a hand, one of my buddies i race with is in okotoks (has an 86 f-350 on 39.5 tsl's, no hood, set of zoomies out through the hood), planning on dd'ing the thing, or any racing with it?
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Thanks for the offer, I will keep it in mind. Truck is going to remain looking stock...it will probably only be driven a thousand or two miles per year....I have the car and bike to ride as well...nice to be able to have choices!..hehe.
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Wow...almost a year has gone by!. I should have all the parts in my grubby paws within another week or so. CR was dropped to 11.44 and a roller cam c/w roller rockers was added. The assembly of the engine will be delayed as I've decided to do a frame off resto on the truck.
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Why would I want to go that low?...for the most efficient engine you want to run the highest cr you can without detonation...there are other factors at work here also...aluminum closed chamber heads, cam duration and altitude.