price wise you need to shop around. for the S14-S15 SR, it would run you at least $2200 to start just for the motor, trans, ecu, and harness. but the S13 SR is a lil cheaper $1500+, and from my understandings has more potential (but i may be mistaken) th

 

i beg to differ. first of all, a long stroke is not horrible for a performance engine. a long stroke with a short rod ratio is poor for high reving (short rod ratios are harder on the whole reciprocating assembly (crank, rods, pisons, rings, bearings), therefore they are not as happy at high rpms), but it will breath much better at low rpm because of the more rapid acceleration of the piston. thus you make your power earlier in the revs. look at the tire hating torque band made by the Nissan's QR25DE with a very low rod ratio.

you can't say that the extra displacement isn't an advantage just b/c of the long stroke. the rod ratio, while being a slight disadvantage, is beyond made up for by the extra 400cc's it has on the SR.

quote SCC, July 2002-
"If you're starting to think rod ratio is worth worrying about, think again. The fact is, within the confines of a given engine, virtually everything is more important than the rod ratio. For example, taking the SR20VE's 86mm bore, 86mm stroke, and 136.3mm connectring rod, and shortening the stroke to 68.7mm created the SR16VE [(rare, japan only 200 narturally aspirated horsepower engine)]. The short stroke made room for an extra-long 144.95mm rod, but the 400cc of lost displacement could have made more power and far more torque than the long rod ever did."



check out Ty Yap's s14- 318.3 rwhp and 329ft-lb of torque on the stock bottom end. not bad, IMO


Nismo Knight- "another point = the KA has a high compression, u cannot run a very high PSI unless u start wrkin on internals"
the KA's compression is 9.1:1. SCC turbo'd a toyota matrix (11.5:1 compression) to 7psi on 91 octane gas.

altima/240sx-"but the S13 SR is a lil cheaper $1500"
what site?

I'm With Stupid-"The only reason the nsport kit is at 240 hp is cause it has a Garrett T04B-R turbo, front mount intercooler and a cone filter. Where as the SR only has a T-25, SMIC, and a stock filter. That all makes a huge difference. BTW the SR20DE was around 150 hp in N/A Silvias"

SR20DE from a silvia Q- 140hp
yes, i forgot to factor in the upgraded turbo, fmic and filter, but those mods on a SR20DET running 7psi would not put it past 240hp.


its possible to get over 205 turbocharged hp out of a KA for the cost of an SR. ($2500 (heavythrottle.com) + IC/Piping + BOV + Downpipe)

 

You haven't said anything at all to disprove my point. All SCC is saying is modifying the stock rod ratio won't do as much for HP as other mods. They use the SR20VE and SR16VE as examples...lol... The SR16VE made 200 HP N/A. The SAME AS THE SR20VE!!!!


So what 4G63's and SR20's do it all the time, except a lot easier.


I forgot to mention compression ratio too....

 

 

Yeah it's because they're the same series of engine. Same design. Displacement would win with engines of the same design, it's what I've been saying all along, but it'll only be a small advantage. Between the KA and the SR the SR has a much better flowing head and more than make up for the displacement. Again and again I can just tell you if you want to see how much of a difference a smaller engine with a better head can do better than a larger engine look at Toyota. If you compare the 105 hp 7A-FE (1.8L economy head) to the 160 hp 4A-GE 20v (1.6L performance head)....

 

SR's dun cost that much anymore....

2500 maybe for an S14 or S15 black top SR

but for S13 redtops, I can get a full long block for 1500.

 

Full longblock is useless without the harness, ecu, ignitor, CAS, MAF. Cut harness red tops have always been $1500.

-Justin

 

That couldn't be any farther from the truth. Those three modifications will flow far more air into the SR20 than it does stock. Research first. Then speak.

 

all i wanna know is where can i get an sr20det red for 1500?

what's included. PM me please.

 

OK then, Oh Sage of the SR, what would be the power output of an SR with cone filter, FMIC and upgraded turbo running 7psi. If you don't know then I'd suggest you close your trap and get to researching.

-Justin

 

chris may's s14 KA-T is pushin 381 rwhp at 17lbs of boost on the OEM head, no port work done at all. at the crank, that's well over 400hp. more than 100 horsies per cylinder. damn.

 

#1 It all depends on the turbo.

#2 The FMIC would add between 5-10.

#3 The cone would not do a hell of a lot.

But you would more than likely be pushing out around 230-235 possibly more.

Now, nsport did this to more likely a brand spaking new engine, terrific compression, all new parts, and got these terrific numbers anyway they could. I can almost garauntee you that if you put that kit on your car, the chances you would push 240(no pun inteded) to the ground would be very unlikely. It's all marketing my friend. EVERY part they used in that engine would be in near perfect condition. I've done my research bud.

 

a stock SR at 7psi with a side mount and air box makes 205 at the crank. add a T4, front mount, and cone filter, but don't turn up the boost, and you're not going to be pushin more than 240hp to the ground. thats like more than a 50hp gain at the crank. um...no.

 

#1 With a good flowing turbo, you could see a 40 hp increase to the ground.

#2 Anyone want to wager? Buy the nsport kit, put it on your car, and I'll bet you any amount of money that that kit will not produce 240hp to the ground. Any takers?

I take paypal

 

When does an SR with a T4 generally hit boost? That's a lot of turbo for a 2.0 liter motor.

-Justin