Boosted Darton Sleeved 427
Boosted Darton Sleeved 427 I was contemplating going with this combo for my Firehawk. Sorry, I have been out of the loop for awhile (spent a lot of time away from home working) but I know there was a lot of info and talk on the darton sleeving process in this forum but when I do a search I cannot find it.
I contacted one of the sponsors of this forum (via email) and they did not recommend and would not build me a boosted darton block, said it was unreliable. I have read about 1200 hp boosted C5R blocks and I would think the darton block would be superior mostly because of the superior liner and increased wall thickness.
I did read recently of a member of this forum that was going to do a 427 and his block had a crack and leaked coolant but did not go into details as far as what caused the crack.
My goals were 725 streetable RWHP (on pump gas) but this is just the number I estimated might be achievable with the 427 and an ATI Procharger. (Maybe this goal was unrealistic but a goal non the less)
Please fill me in on what I missed concerning problems with the Darton block and boost.
(Probably going with an iron block would be best but I would prefer to stay alum.)
I contacted one of the sponsors of this forum (via email) and they did not recommend and would not build me a boosted darton block, said it was unreliable. I have read about 1200 hp boosted C5R blocks and I would think the darton block would be superior mostly because of the superior liner and increased wall thickness.
I did read recently of a member of this forum that was going to do a 427 and his block had a crack and leaked coolant but did not go into details as far as what caused the crack.
My goals were 725 streetable RWHP (on pump gas) but this is just the number I estimated might be achievable with the 427 and an ATI Procharger. (Maybe this goal was unrealistic but a goal non the less)
Please fill me in on what I missed concerning problems with the Darton block and boost.
(Probably going with an iron block would be best but I would prefer to stay alum.)
might want to look at the warhawk block....6 bolts per head as opposed to 4 so itll hold boost better.Bryan Wilkinson did like 850rwhp on pump so u might want to pm him about his setup or search for him.
the manufacture has told me that they would work well, but others have suggested you might have a sealin g problem, honestly i dont know of anyone boosted with a darton sleeved block.
there are a couple of options in keeping an aluminum block you have the ls2 block with a 4" bore so you could do a 403, and also GM is coming out with the l92 witha 4.06 bore so a 412 can be acheived.
those should easily fit your goals and budjet.
there are a couple of options in keeping an aluminum block you have the ls2 block with a 4" bore so you could do a 403, and also GM is coming out with the l92 witha 4.06 bore so a 412 can be acheived.
those should easily fit your goals and budjet.
I've seen several darton sleeved 427's fail with or without boost. Boosting them is not a reliable platform, at least from what I've seen.
If you want big cubes and boost I'd look at the Warhawk, C5R, and LS2 platforms.
Good luck,
Mark
If you want big cubes and boost I'd look at the Warhawk, C5R, and LS2 platforms.
Good luck,
Mark
Originally Posted by mdhmi
I've seen several darton sleeved 427's fail with or without boost. Boosting them is not a reliable platform, at least from what I've seen.
If you want big cubes and boost I'd look at the Warhawk, C5R, and LS2 platforms.
Good luck,
Mark
If you want big cubes and boost I'd look at the Warhawk, C5R, and LS2 platforms.
Good luck,
Mark
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If your goal is just 725streetable hp then that could easily be achieved with a smaller displacement (less costly) longblock setup. A stock cranked iron or alum 6.0L would fill the bill just fine. Save the $$$ for the misc. and unpredictable stuff.
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It has been done sucessfully a number of times.
It does have to be put together correctly and with the correct parts.
This is where many builders miss.
I have seen 1,200 rwhp full drag raced 427 Darton at 22 psi.
Irregardless, there have been a number of C5R failures too with only 200-250 shots. All in the build, with the correct parts, imo.
It does have to be put together correctly and with the correct parts.
This is where many builders miss.
I have seen 1,200 rwhp full drag raced 427 Darton at 22 psi.
Irregardless, there have been a number of C5R failures too with only 200-250 shots. All in the build, with the correct parts, imo.
Originally Posted by Got Me SOM
725 on pump gas can be done with an alum 402 or iron 370 or 408.
personally i'd go with the alum 402 to keep weight off the nose of the car.
personally i'd go with the alum 402 to keep weight off the nose of the car.
It just seems to me that if the Darton system works it has a lot of potential for not only displacement, more power potential due to the liners being stronger than stock, but also room for future freshening when needed. Which if I remember correctly, bore size is very limited on the newer LS blocks even the iron blocks.
I talked to a fellow member on the phone today and he said he had probs. with 3 blocks from a builder and claims most of it was due to improper installation of the sleeve's. He had Steve @ race eng. developement do his recent block but decided to go with a different combo.
I hear what you're saying but even still there are too many stories of dropped sleeves. Why even risk that chance?
Nobody on this forum runs sleeved blocks. Plenty of high hp car/ low 8 cars with iron blocks that have run more than one season hard and they haven't had problems.
Nobody on this forum runs sleeved blocks. Plenty of high hp car/ low 8 cars with iron blocks that have run more than one season hard and they haven't had problems.
Originally Posted by mdhmi
I don't need to post any links. I personally know more than one person who has had problems with Darton 427's.
Mark
Mark
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Originally Posted by Got Me SOM
Nobody on this forum runs sleeved blocks.
Here is a link to the info I have been searching for off and on for @ least a couple weeks.
I am sure some of you have read it but there will be some that haven't.
https://ls1tech.com/forums/showthrea...3&page=1&pp=20
Hopefully it works.
My eye's are fuzzy from reading it all.
I am sure some of you have read it but there will be some that haven't.
https://ls1tech.com/forums/showthrea...3&page=1&pp=20
Hopefully it works.
My eye's are fuzzy from reading it all.