jmod 1/4 times.

[vr4]

got to the track again. this time it wasnt that great. the air temp was 98 and i never really got a chance to let the car cool down.

the jmod did help. with the temps being this high i could tell the car was laying down. anyways...best time was a 14.666@97 with a 2.37 60'

this was after 20 minutes letting the car sit. every other run was 14.8-15.0 at no better than 95.8 mph. all were back to back runs. at topend the needle was between the O and N. real hot.



for comparison my pre-jmod best was 14.665@96.74 with a 2.29 60' this run was done with me leaving the line with the temp at the bottom of the guage and air temp at 82. on yesterdays run the needle was at the top of the A and air temp was 95

i cant wait to run this thing on a cool day with more cool down time.

 

[formerknown]

Makes a difference, doesn't it?

 

[Nitrobasher]

srry to whore your thread but this is a pretty stupid question that i need to know,

i just bought the jmod, and now i need tranny fluid. but i dont konw what tranny fluid to go with? i know its mercon something
but the guy at autozone said if i mix up mercon 3 and mercon 5 it will blow my tranny... can anyone help a brotha out?

 

[formerknown]

Mercon V ONLY.

 

[Dominus]

Mercon V.

Although Mobil One synthetic would be a nice upgrade too.

 

[driller]

but the guy at autozone said if i mix up mercon 3 and mercon 5 it will blow my tranny... can anyone help a brotha out?

Mercon V!

vr4, you need a cooling fan mod.

 

[vr4]

Mercon V!

vr4, you need a cooling fan mod.

yes i do. and a cooler thermostat. i was also gonna see if the radiator i got for my VR4 will fit. dual pass 2 inch core.


as for mixing them...you can but might as well completly flush the trans with merc V

 

[Dominus]

Don't use a double pass radiator if you plan to go to an electric water pump, but it will do nicely with a Cobra R mechanical pump.

 

[vr4]

Don't use a double pass radiator if you plan to go to an electric water pump, but it will do nicely with a Cobra R mechanical pump.

thanks for the tip. why is it?



i planned on staying mechanical pump.


now....whats the diff between the mark, cobra, cobraR, or any other modular pump?

 

[67Continental]

congrats on the times.

 

[Dominus]

thanks for the tip. why is it?

Double pass radiators have a 67% decrease in flow efficiency as compared to a single pass. This can be bad for an electric pump engine at high rpms. A stock pump flows almost or over 100 gph at high rpms, while an electric pump flows a constant 55 gph.

i planned on staying mechanical pump.


now....whats the diff between the mark, cobra, cobraR, or any other modular pump?

The Cobra R pump has the rear face and the front face of the impeller as one solid piece, making for a far more efiicient impeller that cavitates less.

 

[vr4]

Double pass radiators have a 67% decrease in flow efficiency as compared to a single pass. This can be bad for an electric pump engine at high rpms. A stock pump flows almost or over 100 gph at high rpms, while an electric pump flows a constant 55 gph.





The Cobra R pump has the rear face and the front face of the impeller as one solid piece, making for a far more efiicient impeller that cavitates less.

ah. thanks for the info. ill look into the R pump tomorrow.

 

[Dominus]

If you gotta do your water pump, might as well make it a '00R.

Here's a pic at JLP: http://www.johnnylightningperf.com/shop/product_info.php?products_id=18

 

[driller]

A stock pump flows almost or over 100 gph at high rpms, while an electric pump flows a constant 55 gph.

55 GPM(not gph) is plenty. I've noticed no decrease in cooling capability with the Meziere electric pump at the street or track.

 

[Dominus]

55 GPM(not gph) is plenty. I've noticed no decrease in cooling capability with the Meziere electric pump at the street or track.

Yeah, which is exactly why I said that it should be no problem as long as he doesn't use a double pass radiator.

<---------Meziere electric water pump user, in almost every car I own