need help lifted head with plate
03-09-2011, 10:26 AM
#21
A Nitrous jet size of .085" or 2.159mm should produce:
326.29 HP with 1 port(s)
Actual HP to the wheels: 277.35 HP
Its WAY over timed and dead rich !
Q16 is also a NOT a good fuel for nitrous, use C16 or better.
200 shot is a 73 jet.
Who the hell starts tuning with an 85 jet? holy **** !
Regroup and start with 100 shot and work your way up.
326.29 HP with 1 port(s)
Actual HP to the wheels: 277.35 HP
Its WAY over timed and dead rich !
Q16 is also a NOT a good fuel for nitrous, use C16 or better.
200 shot is a 73 jet.
Who the hell starts tuning with an 85 jet? holy **** !
Regroup and start with 100 shot and work your way up.
03-09-2011, 10:29 AM
#22
I have had this happen with ARP head studs and Cometic gaskets. Sprayed the motor at the track, it over heated on the way back to the pits. The plugs looked fine, and I ran it for awhile and it didn't over heat again. I knew it had lifted a head but I was in denial because of the work involved to fix it. Then I sprayed it again and the engine blew coolant out of the radiator. I pulled the head when I got back home and it had lifted the passenger side head gasket.
We have sprayed over 500 shot on ARP head studs and cometics with no issues.
99% of the time like the OP most cars are overtimed and way rich.
03-09-2011, 10:51 AM
#23
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The motor didn't like it too much. 
03-09-2011, 11:02 AM
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A Nitrous jet size of .085" or 2.159mm should produce:
326.29 HP with 1 port(s)
Actual HP to the wheels: 277.35 HP
Its WAY over timed and dead rich !
Q16 is also a NOT a good fuel for nitrous, use C16 or better.
200 shot is a 73 jet.
Who the hell starts tuning with an 85 jet? holy **** !
Regroup and start with 100 shot and work your way up.
326.29 HP with 1 port(s)
Actual HP to the wheels: 277.35 HP
Its WAY over timed and dead rich !
Q16 is also a NOT a good fuel for nitrous, use C16 or better.
200 shot is a 73 jet.
Who the hell starts tuning with an 85 jet? holy **** !
Regroup and start with 100 shot and work your way up.
03-09-2011, 11:14 AM
#26
Years of spraying.... I use http://www.robietherobot.com/nitrousjetcalculator.htm for reference and its pretty close.
Its just a number, doesnt really mean a whole lot and will give you a general idea of how much HP gain.
Spray as much as you need to go as fast as you want.
We have never found a leak down test to be helpful... we do a compression test on our motor and if it checks out we keep hitting it.
Colder plug, less timing, less fuel and C16 instead of Q16.
That will get you going in the right direction.
Its just a number, doesnt really mean a whole lot and will give you a general idea of how much HP gain.
Spray as much as you need to go as fast as you want.
We have never found a leak down test to be helpful... we do a compression test on our motor and if it checks out we keep hitting it.
Colder plug, less timing, less fuel and C16 instead of Q16.
That will get you going in the right direction.
03-09-2011, 01:20 PM
#29
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It went 10.0 last year on i think it was a 24n direct port on my fast but ran out of gear. I switched to the Vic jr and 4barrel TB looking for more rpm and a bit more hp instead of changing the gear. Id like to see 9.60s or close on a similar shot to last years before I start throwing more nitrous at it in an attempt to keep a t56 together for more than 3 passes lol
03-09-2011, 11:19 PM
#31
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leak down test .......................................compression test
........front .................................................f ront
driver........passenger........................... driver......... passenger
45%............45%................................ .170..............160
45%............34%................................ .170..............165
39%............61%................................ .185..............165
40%............36%................................ .180..............160
i also tried a coolant pressure test and at 13-14lbs it held fine but when i went to climb to 16-18lbs it showed a leaking radiator where the plastic end meets the metal. durring the leak down i never heard or saw any bubbles pushed into the radiator or anything. would you be concerned with the 61% on #6. im not totally sold that i couldnt of had some error in the reading.
also my rings are gapped at .028 top .030 2nd
do you guys think im hurt or ok?
........front .................................................f ront
driver........passenger........................... driver......... passenger
45%............45%................................ .170..............160
45%............34%................................ .170..............165
39%............61%................................ .185..............165
40%............36%................................ .180..............160
i also tried a coolant pressure test and at 13-14lbs it held fine but when i went to climb to 16-18lbs it showed a leaking radiator where the plastic end meets the metal. durring the leak down i never heard or saw any bubbles pushed into the radiator or anything. would you be concerned with the 61% on #6. im not totally sold that i couldnt of had some error in the reading.
also my rings are gapped at .028 top .030 2nd
do you guys think im hurt or ok?
Last edited by blue99fbody; 03-09-2011 at 11:24 PM.
03-10-2011, 10:02 AM
#32
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Bump. Any opinions on the test results? Should I be tearing this top end off or do u think its unhurt? Can't get a radiator till tomorrow then ill pressure test the cooling system again
03-10-2011, 12:52 PM
#34
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Ok I may pull it off. May run a few more tests to try to find some solid evidence of a bad Hg. If bradenton wasn't in a week id just take my time and pull it apart but may roll the dice and run it down there, just running na in index anyway there.
