New best with the trusty old D1SC today..
02-17-2007, 11:00 PM
#1
New best with the trusty old D1SC today.. Ran a pair of 9.17s @ 148 or so with the D1SC and the 3.4 pulley today, thats the good news.
Bad news its pushing over a quart of water on a pass and it has new headgaskets. Had the heads checked to make sure they were flat and they were supposedly OK. I was using C16, had the timing down to 14 degrees, 3911 plugs, A/F at 11.2:1, IATs were under 150 (you can see the black smoke on the first pass) and its still pushing water bad at 17.5 psi
There should be no reason for detonation at all with 14 degrees of timing and C16 with sub 150 IATs.
Since I ran the car for a almost 100 passes @ 15psi with one set of gaskets, second set lasted 30 passes and the third lasted 2 passes I would most likley say the heads and/or deck is warped pretty bad. Dont really want to mill these heads any amount, compression is up there enough already.
Kind of a pisser really, I changed some suspension stuff and got the 60's down a little more and even put the headlight motors and wipers back in the car. Planned on making a couple passes on the D1 and swapping the F1A on at the track and getting my 8 second pass but there was so much water under the hood every pass (overflow bottle only holds a quart and it was spraying out the vent in the top of it) I didnt want to take a chance with a couple more PSI.
I may try a different set of heads to drop the compression a little and a little larger cam, really dont want to invest a lot of money in a 346 at this point though. Might just use my crank and rods and stick them in a LS2 block and find the thickest deck heads out there and try again. Cant really complain too much I guess, except driving almost 700 miles again to make 2 passes, been a good setup but I think I can say I about got all I possibly could out of it..
Two passes from today, not much drama now that I got the front end to stay down better, my wife didnt wait for the clocks to come on, frirst pass was a 9.176 @ 147.6 off the foot brake and the second was 9.171 @ 148.2 off the trans brake with the 2 step at 3000:
http://video.ls1tech.com/video/7054c...d8018766b6.htm
Bad news its pushing over a quart of water on a pass and it has new headgaskets. Had the heads checked to make sure they were flat and they were supposedly OK. I was using C16, had the timing down to 14 degrees, 3911 plugs, A/F at 11.2:1, IATs were under 150 (you can see the black smoke on the first pass) and its still pushing water bad at 17.5 psi
There should be no reason for detonation at all with 14 degrees of timing and C16 with sub 150 IATs.Since I ran the car for a almost 100 passes @ 15psi with one set of gaskets, second set lasted 30 passes and the third lasted 2 passes I would most likley say the heads and/or deck is warped pretty bad. Dont really want to mill these heads any amount, compression is up there enough already.
Kind of a pisser really, I changed some suspension stuff and got the 60's down a little more and even put the headlight motors and wipers back in the car. Planned on making a couple passes on the D1 and swapping the F1A on at the track and getting my 8 second pass but there was so much water under the hood every pass (overflow bottle only holds a quart and it was spraying out the vent in the top of it) I didnt want to take a chance with a couple more PSI.
I may try a different set of heads to drop the compression a little and a little larger cam, really dont want to invest a lot of money in a 346 at this point though. Might just use my crank and rods and stick them in a LS2 block and find the thickest deck heads out there and try again. Cant really complain too much I guess, except driving almost 700 miles again to make 2 passes, been a good setup but I think I can say I about got all I possibly could out of it..
Two passes from today, not much drama now that I got the front end to stay down better, my wife didnt wait for the clocks to come on, frirst pass was a 9.176 @ 147.6 off the foot brake and the second was 9.171 @ 148.2 off the trans brake with the 2 step at 3000:
http://video.ls1tech.com/video/7054c...d8018766b6.htm
02-17-2007, 11:06 PM
#5
Originally Posted by SSilverSSurfer
congrats kp, sorry to hear about the water problem though, you'll get there dont worry.
Maybe I fogot to tighten the head studs on one side or something lol, it is really blowing water out bad..
02-17-2007, 11:08 PM
#6
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you should try a new set of heads and see if thats the problem, i know its not as easy as it sounds, 8's on the 346 with the D1 is heaven in my book, lol
Congrats on the new best Kev, I love seeing these posts.Trending Topics
02-17-2007, 11:16 PM
#9
Originally Posted by SSilverSSurfer
you should try a new set of heads and see if thats the problem, i know its not as easy as it sounds, 8's on the 346 with the D1 is heaven in my book, lol
02-17-2007, 11:22 PM
#12
Originally Posted by BIG BAD BLACKSS
What compression are you at now? Im looking to be your shadow with a camaro and a similar setup but an iron 370 block. lol Stop going faster, how am gonna beat you if you keep this up? lol
Heh, unlike a lot of people I ENCOURAGE people to run faster then me and I am really happy when I see people run as well or better with a similar combo, thats why every single part on this car and what I did is on my web page. Trust me if I can build ths whole car in my garage with hand tools (and a TIG welder
) then anyone should be able to.
02-17-2007, 11:29 PM
#13
Originally Posted by frcefed98
Get a set of new used 317's for cheap and TNT with those....won't cost but a dime and some time...
It'd be great to see the D1 get you a 8.
J
It'd be great to see the D1 get you a 8.
J
I'm asking a lot out a little factory aluminum block though I guess, its probably about as square as a soccar ball after what I put it through lol.
02-17-2007, 11:31 PM
#14
I was looking for 9.5:1 also, but id like to stay on pump 93 as much as possible, so i guess i gotta go lower. I was thinking betwen 8.8 and 9.2 somewhere. Iron block with im not sure what heads yet. Kinda at a brick wall trying to decide on a compression ratio and a head.
02-17-2007, 11:33 PM
#16
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Incredible ets and mph is off the chart for a little old 346 with a D1SC blower and still a 01 Z06 cam (right)? Are you still running the DART 225 heads on this bad boy. If yes, why not just buy another pair from summit for $1,650 and then you would be good to for a while again. Or how about the 225 PATRIOTs LQ9 72cc blower heads and turn up the boost a notch or so for a nice budget $1,200 head that shoud last for a season or two one would hope! 
You have RAISED the bar REALLY high for a ATI D1SC small cubed motor and sorry to here about the mechanical issues but it certainly will come with the territory you are in the thick of the way you DRAG Race that Rocket Ship!!
BEST OF LUCK and you are doing us small cubed D1SC guys WAY PROUD BRO!! 
You have RAISED the bar REALLY high for a ATI D1SC small cubed motor and sorry to here about the mechanical issues but it certainly will come with the territory you are in the thick of the way you DRAG Race that Rocket Ship!!
BEST OF LUCK and you are doing us small cubed D1SC guys WAY PROUD BRO!!
02-17-2007, 11:38 PM
#19
Originally Posted by BIG BAD BLACKSS
I was looking for 9.5:1 also, but id like to stay on pump 93 as much as possible, so i guess i gotta go lower. I was thinking betwen 8.8 and 9.2 somewhere. Iron block with im not sure what heads yet. Kinda at a brick wall trying to decide on a compression ratio and a head.
Meth would be a different story..The bigger bore would be a little more prone to detonation so 8.8 to 9:1 would be a good start..
02-17-2007, 11:44 PM
#20
Originally Posted by MTI 427 C5 Roadster
Incredible ets and mph is off the chart for a little old 346 with a D1SC blower and still a 01 Z06 cam (right)? Are you still running the DART 225 heads on this bad boy. If yes, why not just buy another pair from summit for $1,650 and then you would be good to for a while again. Or how about the 225 PATRIOTs LQ9 72cc blower heads and turn up the boost a notch or so for a nice budget $1,200 head that shoud last for a season or two one would hope!
You have RAISED the bar REALLY high for a ATI D1SC small cubed motor and sorry to here about the mechanical issues but it certainly will come with the territory you are in the thick of the way you DRAG Race that Rocket Ship!!
BEST OF LUCK and you are doing us small cubed D1SC guys WAY PROUD BRO!!
You have RAISED the bar REALLY high for a ATI D1SC small cubed motor and sorry to here about the mechanical issues but it certainly will come with the territory you are in the thick of the way you DRAG Race that Rocket Ship!!
BEST OF LUCK and you are doing us small cubed D1SC guys WAY PROUD BRO!!
But yea, I beat the **** out of this thing a couple times a month year round, my old high 8 second big block cars would need some freshining up once a year too. Just looking at the decks on the heads is really amazing they take as much abuse as they do, there is really nothing there..