sbman
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I've used 680 and one size smaller (5 somethig) for starting duties on 320 cubic inch Lycoming aircraft engines. They pull almost as much amps as a large diesel, works great.
Builds 80 series where to start! Again.... (3 Viewers)
- Thread starter scottryana
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I've used 680 and one size smaller (5 somethig) for starting duties on 320 cubic inch Lycoming aircraft engines. They pull almost as much amps as a large diesel, works great.
- Thread starter
- #822
Awesome, if the 925 is working well I might give the 625 a try it looks like it is a little more power than a 680, and only weighs 13lbs.
What's your compression ratio going to be?
- Thread starter
- #824
10:1 Pistons but it will probably be high 9's once I clean up the combustion chambers.
Can u go lower with a thick head gasket?
- Thread starter
- #826
Oh OK. Typically turbo setups are lower compression. Was just curious.
- Thread starter
- #828
Yeah back in the day turbo setups used to run about 8:1-8.5:1, but they didn't have the technology we do now to control timing and fuel, so it was a big precaution against detonation. But now days turbo builds are pushing the compression up to get faster spool, better off boost performance and better drivability. 10:1 is very common on E85 and 9.5:1 is very common on pump gas. So being high 9's should give me a good mix so that I can run 12-14psi on pump, 20-25psi on E85 and 30+psi on E99.
bump with a video
GD that monster really doesn't start making serious boost till nearly 7g's and then that 88mm fan takes the eff off!
- Thread starter
- #831
The interesting part to me is; unported head, stock head stud size, and unfilled block. At over 54psi and 1850hp! That is absolutely crazy. The 2JZ is still the king.
2KCruiser
Everything 2KRacing, practically live here
Great to see how programming has come so far in the last 10 years, hence closer tolerances are acheived and these insane dyno numbers will keep coming.
Ok bought a motor and transmission off a local guy and engine is on the que to get worked over. I think Im a little ahead in the curve as far as getting a transmission done. What all are you have ATI do to the tranny? I'll be the guinea pig and test it out. Im shooting for 750hp; so if it holds that, you should at least have a baseline. PM me specs.
Also do you have a recommendation on head work? Valve sizes and springs etc for my application? Not going as extreme as this build.
Also do you have a recommendation on head work? Valve sizes and springs etc for my application? Not going as extreme as this build.
- Thread starter
- #834
Awesome! Well I don't think ATI does the A343F transmission I would recommend you send it to ATF Speed in Florida. They are the ones that just set the 1/4 mile record with the A340. They have it holding high 800hp in a Supra. They have new billet parts that should work in the A343F.
For head work I would look at Brooks Elliott Cylinder Head in Austin. I would at the very least go to a stiffer valve spring as you will get some valve float at those boost levels. Depending on how much you want to spend, also up size the valves. The head is going to be your best bet to make power but it is also the part you could spend the most money on. Very easy to add cams, hand porting, etc but I think the stock head with larger valves will probably flow well enough.
ATF Speed.com
Brooks Elliott Cylinder Heads
For head work I would look at Brooks Elliott Cylinder Head in Austin. I would at the very least go to a stiffer valve spring as you will get some valve float at those boost levels. Depending on how much you want to spend, also up size the valves. The head is going to be your best bet to make power but it is also the part you could spend the most money on. Very easy to add cams, hand porting, etc but I think the stock head with larger valves will probably flow well enough.
ATF Speed.com
Brooks Elliott Cylinder Heads
ATF is who I meant... Ok crossing fingers on this!
- Thread starter
- #836
Fresh off the boat from Austalia! Thanks Sean, MS75 here on mud. Great looking very solid piece!
Anything happened in the last few weeks?
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- #838
Just waiting on my custom shocks and then it's finally time to get some work done!! Lol.
- Thread starter
- #839
Well I have been talking to Headgames, they are big in the Supra world, they have a lot of credibility with race teams etc. They feel like the head work that I want to do is excessive for the "small" amount of power I want to make. They said 1100hp could be done on stock valves and cams. They told me they just did a Nissan TB48 with stock valves and cams for for Al-Anabi racing in the Middle East and made 1200hp.
So I am a little stuck. I have all the parts for a killer upgraded head but I also have a very well known shop telling me not to waste my time. But better flow would mean more power at less boost, less boost means less heat, etc.
After looking at MS75's head flow numbers after a porting it only makes sense
So I am a little stuck. I have all the parts for a killer upgraded head but I also have a very well known shop telling me not to waste my time. But better flow would mean more power at less boost, less boost means less heat, etc.
After looking at MS75's head flow numbers after a porting it only makes sense
Since you have the parts for the upgrade already, I agree you would be better off using them. Really cool to know that kind of power can be made on a stock head though! Temptation grows for my own turbo 1FZ-FE!
