connecting rods

Post by **Wakkolio** » Thu Mar 06, 2003 9:45 pm

I have a 93 ka24de and plan on turbocharging it. What would be the advantage of using an aftermarket forge rod such as Crower vs the factory forged rod? Is the material different or is it just a cool factor?

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

you tell me which one you think is stronger....adam

Post by **huguetpj** » Thu Mar 06, 2003 9:45 pm

Adam... I'm guessing those are Crower rods? Where did you get the pistons/rods?

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

manley nascar rods and custom ross pistons

Post by **huguetpj** » Thu Mar 06, 2003 9:45 pm

any place I could get those online?

Post by **huguetpj** » Thu Mar 06, 2003 9:45 pm

nevermind I found them

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

the ends have to be resized as they are made for a V8

Post by **far1002** » Thu Mar 06, 2003 9:45 pm

adamhu are you rebuilding your motor did it give out or are you just rebuilding it

Post by **SOHC240SX** » Thu Mar 06, 2003 9:45 pm

Adam, do you have the part number for those ARP head studs? What compression ratio and cylinder bore are you running with those pistons from Ross?

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

sorry no clue on the ARP stud part numbers....

compression ratio is stock.....over bore was 20 thou

Post by **SOHC240SX** » Thu Mar 06, 2003 9:45 pm

Stock for the SOHC somewhat of a question. The SOHC was first avaliable in a 9.1:1 CR, later Nissan lowered the CR to 8.6:1...at least in the states. Not sure about Canada models. Do you know what is the actual CR in your motor? From the flat top design, I would think it is the 9.1:1 CR. Is this correct? Also what pistion rings did you decide to use in your setup?

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

comp ratio is 8.6: 1 with flat top design

used total seal rings if i recall

block was also o-ringed

Post by **SOHC240SX** » Thu Mar 06, 2003 9:45 pm

Wow, really! Do you still have the job number for the Ross pistons? I would like to use those pistons for my project. But don't you think that maybe you should have lowered the CR a little bit lower since your planning to run 25PSI? Perhaps like 8.2:1 or so just so that their is less stress on the rest of the motor??

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

the car is really only driven on the track...so i just run race gas....so its not an issue...

though i did destroy a head last year when the wastegate line caught on fire and i boosted to 27psi and detonated....chipped a valve on #3 and cracked the head on #4, and blew out the head gasket..

sorry don't have any job number on the pistons

Post by **Matthew** » Thu Mar 06, 2003 9:45 pm

ADAMHU: if it isnt too much trouble, do you have any close up pics of the stock ring lands?

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

as you can see the first ring land on the custom piston is almost twice as thick as the stock piston

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

ok....sorry its only around 37% bigger than the stock lands

Post by **SOHC240SX** » Thu Mar 06, 2003 9:45 pm

Ahhh, but of course, racing fuel. Since you don't have the job number for the Ross pistons, how would you go about ordering replacement pistons with the same specs if need be? Have you had any problems with the total seal rings? I have heard many bad things about them, but nothing that has been proven with any merit.

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

i would just go back to my engine builder..since he would be fixing the motor anyway...he designed the piston specs in the first place..i just told him what i wanted..

so far nothing went bad with my rings...i have 2 years of racing on them...maybe about 2000km of hard use

Post by **SOHC240SX** » Thu Mar 06, 2003 9:45 pm

Adam, as far as head work is concerned, have you ever thought of using stainless steel valves?

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

yes...but they would all have to be custom made...so far the stock valves have lasted ok....

Post by **SOHC240SX** » Thu Mar 06, 2003 9:45 pm

True, I was thinking it would be worth it though. By the way, what type of spark plug do you use and what heat range did you select??????

Post by **ADAMHU** » Thu Mar 06, 2003 9:45 pm

stock ngk plugs...heat range 11 (cold) gapped to 25 thou

connecting rods

connecting rods

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