Not a Protege but...

Fear

Banned
i've consistently been a fan of making huge loads of go without forced induction (including nitrous). after reviewing this section, you guys seem to get a lot more support going all motor than i do over at any of the sentra boards. so i figured i would share my upcoming motor build.

AEBS sleeved block
93mm 11:1 C/R pistons
Stock crank
Pauter rods
Custom ground cams (bout 270's, around .5 lift)
Custom springs
Polk Performance race port head
1mm oversized Inconel valves
Polk Performance sheet-metal intake manifold
AEBS header
3" mandrel bent exhaust
TEC III stand alone
Hotshot or custom cold air intake
BS removal kit
Lightened pulleys
JWT clutch and flywheel

This will yield a 2.7 liter that will rev to around 7000rpm, maybe slightly higher. My current setup has been deemed not fun enough, so i decided to go ahead and invest in something slightly more....awesome. as it stands now, my best trap speed is 103.66, but it just isnt enough. albeit far from a drag car, it's decent enough to lay the smack on unsuspecting ricers.

ok, enough about that. this will not be by any means a drag car, and i will probably never ever build one. this will be purely for road racing. with the build listed above, we are targeting 250-260whp with a torque band bigger than fat albert. as many of you know, peak numbers are garbage. the QR25 has been blessed with a good amount of torque from the factory, and the only other option to this build was a destroke... i like torque, damnit. hilariously enough, this is being built by a nissan regular, travis from forced induction racing (ironic, i know).


as for the rest of the car, there's a target weight of 2500 with driver, JIC FLT-A2 coilovers with approximately 850-865lb springs used at all 4 corners. all nismo sway bars and the lower tie bar will be used, along with solid 98 durometer engine mounts. i''l be keeping the buddy club p-1's and running 235/40/17 a032-r's with about 2 degrees of negative camber and some toe in at the front, and a rear beam bend (sets toe to 0). i'll more than likely end up using a 7-9 gal fuel cell, for weight's sake.

this hits the wallet hard, but damnit, i enjoy it. feel free to ask any questions, and i'll do my best to have them answered asap.



-Phil
 
Interesting. Looks like a serious build, I can't wait to see the results. How much are you involved in the build? I'd love to know how the TEC III turns out. Did you do a baseline run or a dyno run at any time yet? I heard they baseline at around 140 stock. I know they have a generous stroke, but what's the rod length?

I'd say 250-260whp is totally resonable from a 2.7L.
 
very nice build u have going there, glad to see there is someone else in the Chicagoland area besides myself(seems like it) that enjoys an all motor setup. what r your current 1/4th mile times? should turn out to be a great setup.
 
duuuuuuude.....your car rips the street apart from that one ride I had down at starved rock. Seriously insane power even untuned. Keep up the good work.
 
not getting any support for N/A? that's odd considering the two people I know with SpecVs tell me that its STUPID to boost them(dunno)

good luck witht he build...sounds tasty:D
 
DevilsSi1481 said:
very nice build u have going there, glad to see there is someone else in the Chicagoland area besides myself(seems like it) that enjoys an all motor setup. what r your current 1/4th mile times? should turn out to be a great setup.


untuned, bested 13.728, and best trap is above.

and yes, on stock internals it isnt a good idea to go past around 8psi depending on what kit is being used.... but people with that much boost are making from 240-280whp. i think the most powerful spec-v as of right now is this guy dion, making well over 500whp. travis from FIR also built that motor.
 
Gen1GT said:
Interesting. Looks like a serious build, I can't wait to see the results. How much are you involved in the build? I'd love to know how the TEC III turns out. Did you do a baseline run or a dyno run at any time yet? I heard they baseline at around 140 stock. I know they have a generous stroke, but what's the rod length?

I'd say 250-260whp is totally resonable from a 2.7L.


i'll be involved as much as i can be. i've done all the current work myself, outside of the port matching and extrude hone.


baseline for a spec-v is so inconsistent, people have seen from 142-156 stock. nevertheless, a good powerband makes things all the better.


and as far as rod length, i'm having a super brain fart right now, but the stroke is 100.6mm. we're trying to make things as square as possible, but since we can not use an o-ring setup, we're limited to a 93mm bore. if youve ever looked at a spec-v motor, it is very tall but not long at all.

and btw, the QR25 is possibly the crappiest sounding 4-banger i have ever heard short of a straight-piped b-series. (hand)
 
haha, yur not kidding...i helped "Kain" install a header on his SpecV and it sounds like ASS now(lol2)
 
Dexter said:
sweet. can i pick the day and how?
yes and YES.

thats some awesome times though for all motor, rarely hear any time that quick on imports unless they are turbo'd.
 
very nice plans and current build, i like the specV's and their skyline inspired looks and they have a great engine for potential.

I dont know if you have considered this but SCC did a theoretical engine build for the old and new sentras and supposedly either the bottom end of the sr20 can be mated to the qr25head or the other way around, and according to SCC that would provide the benefits of both engines, better breathing, flowing and more responsive to bolt ons and other mods, hell they saw a 12hp(crank) gain from an exhaust alone....

Other comments about your build, i assume you already covered this but what about you valvetrain supporting the new power and rpms, getting new springs and so forth or what?

Also a 3in ID exhaust even on a 2.7 NA car is a bit overkill, the techs at gerret talked about exhaust size and in turbo cases you want the biggest pipe from the turbo back but in NA cases 2.25 is good enough 2.5 max for a big NA build. Ill look around to see if I can find That thread and the garrett article.

Cant wait to see how it turns out...what are your plans for suspension and wheel/tire combo for that guy? maybe run some good tires on the stock wheels and surprise everyone when you cook em....
 
p5sundevil said:
very nice plans and current build, i like the specV's and their skyline inspired looks and they have a great engine for potential.

I dont know if you have considered this but SCC did a theoretical engine build for the old and new sentras and supposedly either the bottom end of the sr20 can be mated to the qr25head or the other way around, and according to SCC that would provide the benefits of both engines, better breathing, flowing and more responsive to bolt ons and other mods, hell they saw a 12hp(crank) gain from an exhaust alone....

Other comments about your build, i assume you already covered this but what about you valvetrain supporting the new power and rpms, getting new springs and so forth or what?

Also a 3in ID exhaust even on a 2.7 NA car is a bit overkill, the techs at gerret talked about exhaust size and in turbo cases you want the biggest pipe from the turbo back but in NA cases 2.25 is good enough 2.5 max for a big NA build. Ill look around to see if I can find That thread and the garrett article.

Cant wait to see how it turns out...what are your plans for suspension and wheel/tire combo for that guy? maybe run some good tires on the stock wheels and surprise everyone when you cook em....


2.5" will limit the powerband up top. 2.7L at 7k is moving a LOT of air.


and there is no way an SR20 will match up with anything from a QR. the QR20 (jdm) crank will fit, but it's much less beefy. and since big displacement is what we need, a 2.0 crank is out of the question.
 
and tire choice is listed in the orig. post. 235/40/17 yoko/advan a-032r's on my buddy club p-1 wheels.
 

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