NA SR20DE

Post by **JaPPster** » Wed Oct 18, 2006 9:05 am

hi guys!

what to do to increase power to round 180-190bhp ( at crank would do )

thx!

p.s. new in sr world!!

Post by **JaPPster** » Wed Oct 18, 2006 9:11 am

o silly me i have 91' sunny ( pulsar in UK ) silver top, high port 143bhp, CR is 10:1, so i was informed..

Post by **RED_DET** » Wed Oct 18, 2006 11:16 am

Intake/Header/Exhaust/Cams will get you around 150-160whp which is around 180-190 bhp.

Post by **JaPPster** » Wed Oct 18, 2006 10:48 pm

thx, but can you get more detail? what cams, etc..

Post by **RED_DET** » Thu Oct 19, 2006 9:17 am

Jim Wolf Technology S4 cams and S5's if you want to be nasty.

Post by **nametakennow** » Thu Oct 19, 2006 9:18 am

I'm not sure what UK vendors there are.

In the US, it'd be

cams: JWT S4s or S5s (if you don't mind a peaky powerband)

intake: Injen/AEM

exhaust: VRS, Greddy or a few others

header: Hotshot, OBX, or SS Autochrome (terrible usually, but this one's a good rip off of the HS design)

Post by **JaPPster** » Thu Oct 19, 2006 9:28 am

do i have to replace springs with that cams?port&polish, yes/no( is it worth )? what diameter do you recommend for an exhaust? 2 inch? fuelling, does a stock injectors and ecu handle that upgrades?

thanks for help!sorry for my english, not my primary language..

Post by **RED_DET** » Thu Oct 19, 2006 4:23 pm

No springs necessary with new cams. The rev limiter is 7500, so not a problem with floating valves. 2.25" exhaust is the biggest I would run on a NA car. Stock injectors and oem fuel pump will handle the upgrade. You can have the ecu reprogrammed by Jim Wolf also, but it is not necessary. Plus they want $500 for a ecu upgrade and take an eternity to get it done. Just use the stock ECU and if you want, you can run a S AFC to do some fine tuning throughout the rpm range. I would also consider getting some lightweight pulleys as well. They don't increase horsepower, but they do lower the weight of the rotational mass, which makes for faster acceleration. A light weight flywheel will also do the same thing.

Post by **JaPPster** » Tue Oct 31, 2006 10:33 am

thx RED_DET!! anyone else have something to add?

Post by **outlaw_customs** » Tue Nov 28, 2006 3:22 pm

Who told you that? i have the high port too (the one with the injectors on top and the stock extractors)

Is this really true?

Post by **RED_DET** » Tue Nov 28, 2006 4:42 pm

Told him what?

Post by **SR20drftSX** » Sun Mar 25, 2007 4:49 pm

yeah told him what? i have the high port aswell...heres the link to mine..someone give me a guestimate of my horsepower rating please..

zerothread?id=238014

Post by **HurryupandrunS13** » Tue Apr 03, 2007 12:12 pm

Maybe an adjustable FPR, and bump up the fuel pressure a few psi.

Post by **SR20drftSX** » Tue Apr 03, 2007 4:53 pm

for what? increase hp? yeah could be..check yur plugs tho..if they are nice and toasty brown color then your on the money , whitish and yur not gettin enough fuel , black , the opposite

how much do the JWT s4's run and where can i order them? are they terribly hard to install? could an amateur like myself do the install? i mean , ive taken apart and SOHC and replace timing chain and guides..and basic wrenching

Post by **nametakennow** » Tue Apr 03, 2007 8:36 pm

Call JWT directly, the number is on the website - http://jimwolftechnology.com - to place an order. They're about $600 if I recall, pricing is also on the website. The only install issue that I'd be wary of is making sure the valves are aligned properly afterwards. IMO it's much better to have someone to blame if your valves are bent to Hell after the install, so I'd have a shop do it. I was quoted about $700 for a cam install awhile back.

I don't see the point in having an FPR if you don't have serious mods and a piggyback or reprogrammed ECU to adjust for the higher pressure. Bumping up fuel pressure does practically nothing unless you actually need significantly more fuel (a-la turbo).

Post by **Chris859** » Wed Apr 04, 2007 10:16 pm

Doing the vvl head swap with a set of sr16ve n1 cams would get you close...If not over 190hp at the crank

Post by **SR20drftSX** » Thu Apr 05, 2007 5:03 pm

that would be hard to find...why would those cams work better? aren't they for a lower displacement engine? i'd rather get some cams designed right for my exact engine

Post by **Chris859** » Thu Apr 05, 2007 6:42 pm

The sr16ve n1 cams have more lift, and more agressive duration than the sr20ve cams. They are known to get you around 15hp more than the sr20ve cams. I have seen the head swaps go for around $600-$900. Just the sr20ve head swap(without changing the cams out in it) should be good for around 180hp... allthough, you really need a tuned ecu to take advantage of them - considering the stock rpm limiter is around 7300rpm, and the sr20ve will run out to 8500 in stock form.

Post by **SR20drftSX** » Sat Apr 07, 2007 1:35 pm

sure the head will hold up...but yur bottom end and rings wont

Post by **Chris859** » Sat Apr 07, 2007 6:02 pm

actually yeah, it will hold up fine... Many people on other nissan forums have done the conversion. Believe it or not, the b13/b14 sr20de bottom end is STRONGER than the sr20ve. The earlier sr20de uses an 8 counterweight crank, as well as a factory main girdle design on the main caps. Where as the roller cam sr20de(2000+), and all of the sr-ve engines only have a 4 counterweight crank, and standard non-braced main caps.

Why? The newer engines were produced lighter, to aid in less overall vehicle weight, and less rotating mass to improve overall fuel mileage/emissions.

All of the sr20de bottom end components(provided they are in good condition) are safe for well over 8500rpm in stock form, all of the sr-de/det's high rpm problems are in the head/valvetrain.

Look, I know what im talking about here - this is about giving the OP options, so HE can decide - NOT petty bickering over what is better, not post-whoring and trying to prove me wrong with blanket statements that are untrue. Obviously, judging from your coments you know little about the ve engines, and the differences between them and the de. I would also venture as far as to say you (while good intentioned), don't know a whole lot about engine mechanical/performance aspects - for example, the statement you made about using the sr16 cams being a bad idea, JUST because they were from a smaller displacement engine. I have said my part - if the op decides to go the ve route, and needs more info he can get a hold of me - and I can share any info needed. /end bickering

Post by **nametakennow** » Sun Apr 08, 2007 10:06 am

Ding ding ding. I'd heard of using SR16 cams, but I couldn't remember the specifics of why they were better. Thanks for coming in and clearing that up.

It seems like a VE head swap and SR16 cams would end up costing the same as a complete VE engine swap, which would probably be simpler install-wise.

Post by **SR20drftSX** » Tue Apr 10, 2007 5:49 am

haha , here's an opinion "your a d!ck"...and yes im an amateur and this is my first sr20 so lay off a$$hat. good thing you've shared your "wealth of knowledge" for all us to enjoy and benefit from , i hope you have a good day and feel better about yourself now

Post by **SR20drftSX** » Tue Apr 10, 2007 5:54 am

and furthermore...who is bickering over what is better?? who is using blanket statements?? and who is post whoring?? i certainly was not. and i dont give a **** about a head swap , which would cost more and be more time consuming in the end than just a cam swap..you sir are the only one bickering

Post by **Chris859** » Tue Apr 10, 2007 6:04 pm

Wow... sorry you think im a "d!ck", and an "a$$hat". I don't share my wealth of knowledge to make myself feel better... I could give a rats a$$. I feel fine about myself, and I help out plenty of nissan enthusiasts locally. I share the info I have gained being part of misc nissan communities over the years, and the several different builds I have done, for the benefit of the forums I am a part of. Once again - sorry you are so offended by me posting useful knowledge that im sure some people might be interested in. If me sharing knowledge is such a horrible thing, I guess ill just stop posting info for people...

Post by **SR20drftSX** » Tue Apr 10, 2007 6:30 pm

did i say your posting of knowledge was a terrible thing? no..i said yu were being a d!ck to me , pretty much for no reason ,i appreciate your help and giving your opinion and other options besides giving Jim Wolf my hard earned dollar..thanks /endbitchingateachother

NA SR20DE

NA SR20DE

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