what's the real difference between a 4g vtec and a 4g Si
I'm starting to feel that Vtec is all hype
if you ran them side by side, equal driver ability, how would it go
from start to finish give me a detailed race between the two
(like where the Si would trounce the Vtec and where the Vtec would trounce the Si)
how much distance do you need for the Vtec to start pulling away from the Si
how long does it take the Vtec to catch up after the Si start
Originally posted by dj_wawa what's the real difference between a 4g vtec and a 4g Si
I'm starting to feel that Vtec is all hype
if you ran them side by side, equal driver ability, how would it go
from start to finish give me a detailed race between the two
(like where the Si would trounce the Vtec and where the Vtec would trounce the Si)
how much distance do you need for the Vtec to start pulling away from the Si
how long does it take the Vtec to catch up after the Si start
details please
thanks
The difference is about 1/2 to 3/4 of a second stock, in the 1/4 mile.
While the Si has nice low end torque, 156 ft. lbs, the VTEC has 158, and then pulls even harder once you get up above 5K rpms. The Si starts to level off at about 5,500 to 6,200. you can also tell the Si's 160 h.p. peak versus the VTEC's 190, which is slightly under rated.
I have driven both cars, and I mean many different cars, and the result was always that the VTEC very noticably outpulls the Si.
Mine ran high 14's stock, or a 15.1 at the higher slower strip in Commerce. I know a guy, who use to post in here all the time, Prelude RCR, who ran high 15's stock with an AEM CAI, and finally low 14's with a 90 shot of nitrous.
By that time my car was running slightly faster than his, with a LOT of modifications.
Top end is also noticably stronger in the VTEC, with a higher top speed of at least 140 stock.
The Si's torque does come on a bit quicker, but it runs out of steam to fast as the rpms rise, where as the VTEC just pulls harder and harder right to redline.
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2007 350Z (San Marino Blue)
Best 1/4 so far, 13.198, best trap 107.19. *stock*
2002 I35 Sport *stock*
2005 Armada SE *stock*
The difference is about 1/2 to 3/4 of a second stock, in the 1/4 mile.
While the Si has nice low end torque, 156 ft. lbs, the VTEC has 158, and then pulls even harder once you get up above 5K rpms. The Si starts to level off at about 5,500 to 6,200. you can also tell the Si's 160 h.p. peak versus the VTEC's 190, which is slightly under rated.
I have driven both cars, and I mean many different cars, and the result was always that the VTEC very noticably outpulls the Si.
Mine ran high 14's stock, or a 15.1 at the higher slower strip in Commerce. I know a guy, who use to post in here all the time, Prelude RCR, who ran high 15's stock with an AEM CAI, and finally low 14's with a 90 shot of nitrous.
By that time my car was running slightly faster than his, with a LOT of modifications.
Top end is also noticably stronger in the VTEC, with a higher top speed of at least 140 stock.
The Si's torque does come on a bit quicker, but it runs out of steam to fast as the rpms rise, where as the VTEC just pulls harder and harder right to redline.
thanks officer!
I'm gonna go look for some seafood now since it's past 1 am
oh, I don't think you heard, I had the NASTIEST tin of sardines yesterday uke:
almost didn't stomach it
stock for stock, with equal drivers, a VTEC will win. 30 more HP...it better win. They aren't THAT much stronger though...a few mods on an Si will allow you to keep up just fine.
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Gone, but not forgotten...rest in peace Jon.
I'll strongly agree w/ Can'tDrive55. W/ a few effective mods, you can keep up w/ & pull on VTECS, although you'd need to do a lot to beat them outright. That's common knowledge, though ... nothing special about that. But then again, who buys a VTEC & leaves it stock???
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Jason (AIM-->JDMSLICK96, or MSN IM-->JDMSLICK96)... For SALE: Recaro SRD Limited Edition seats, VTEC sub enclosure w/ Kicker 6x9 Free Air subwoofer (& free amp). PM w/ offers. Rest In Eternal Peace, Capt Derek Argel, Capt Jeremy Fresques, Pfc Chris Hill, & Sgt John House (all lost to Iraqi conflict).
Anybody want to buy my Lude? (Will sell in either stock or fairly modded trim).
Originally posted by cantdrive55
at about 4000 we get a nice sound that kicks in when all the intake runners open up.
Or, if you got your intake manifold ported & polished, and took the flapper valve out, you get an even nicer sound ALL OF THE TIME. Hehehe...
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Jason (AIM-->JDMSLICK96, or MSN IM-->JDMSLICK96)... For SALE: Recaro SRD Limited Edition seats, VTEC sub enclosure w/ Kicker 6x9 Free Air subwoofer (& free amp). PM w/ offers. Rest In Eternal Peace, Capt Derek Argel, Capt Jeremy Fresques, Pfc Chris Hill, & Sgt John House (all lost to Iraqi conflict).
Anybody want to buy my Lude? (Will sell in either stock or fairly modded trim).
Originally posted by VeeTec The difference is about 1/2 to 3/4 of a second stock, in the 1/4 mile.
Thats about right, ask cantdrive55
At the time of the race, he had an AEM CAI and I had a short ram on my JDM H22.
Although, it the race was between his Si, and my car when it was an Si, I think he would have an edge due to my extra 60 or so pounds of 4WS equipment.
Originally posted by dj_wawa how much distance do you need for the Vtec to start pulling away from the Si
how long does it take the Vtec to catch up after the Si start
details please
thanks
Partially due to better launches, partially due to more Tq, lower, the Si would pull on me in 1st, I would catch up by the time he was shifting into 2nd as I was still climbing in 1st (higher redline).
By the time I was back into VTEC in 2nd I was about a fender ahead... Afer that, I never drop out of VTEC and pull on him all the way to the finish where he would meet me about a .8 seconds later.
I ran a 15.5 @ 90, he ran a 16.4? 16.3?, dunno the trap speed.
get "the" turbo
you make it sound like a factory option
I think turbos belong on turbo cars
why? you can spend $4K on N/A mods and then not be able to hold a candle to someone who dropped that 4 grand on some sort of F/I...... faster is faster..
p.s. vtec isnt all that. vtec spec cams in an Si it will run just as fast as a VTEC lude
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1994 Prelude Si 5-Speed
AEM CAI
Thermal Cat-Back
Zex Nitrous Kit
Custom Cleared Taillights
Jason (AIM-->JDMSLICK96, or MSN IM-->JDMSLICK96)... For SALE: Recaro SRD Limited Edition seats, VTEC sub enclosure w/ Kicker 6x9 Free Air subwoofer (& free amp). PM w/ offers. Rest In Eternal Peace, Capt Derek Argel, Capt Jeremy Fresques, Pfc Chris Hill, & Sgt John House (all lost to Iraqi conflict).
Anybody want to buy my Lude? (Will sell in either stock or fairly modded trim).
Originally posted by SLICK96 Can you even run "VTEC spec cams" in an Si?
I'd assume that you could run custom Si cams with the cam height and duration identical to the VTEC lobe on the VTEC cam. You'd have a lopey idle, but it is plausible. Has anyone done it? And an Si with VTEC spec cams won't run as fast as a VTEC, the VTEC will still be a hair faster due to the higher compression pistons. I would think that if the Si motor had VTEC spec cams, and pistons with the same compression, and if you bumped the rev limt up a bit, the Si would run slightly faster, due to the small .1L of displacement advantage the H23 has.
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Gone, but not forgotten...rest in peace Jon.
Originally posted by cantdrive55
I'd assume that you could run custom Si cams with the cam height and duration identical to the VTEC lobe on the VTEC cam. You'd have a lopey idle, but it is plausible. Has anyone done it? And an Si with VTEC spec cams won't run as fast as a VTEC, the VTEC will still be a hair faster due to the higher compression pistons. I would think that if the Si motor had VTEC spec cams, and pistons with the same compression, and if you bumped the rev limt up a bit, the Si would run slightly faster, due to the small .1L of displacement advantage the H23 has.
EXACTLY!!!! you hit the nail right on the head as to why vtec doesnt make power... it would have a lopey idle and less low-end power, but you are never that low in the powerband when racing to be affected. i doubt the compression increase would make a very noticeable difference, but i doubt the .1L increase of the H23 would be too niticeable either...
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1994 Prelude Si 5-Speed
AEM CAI
Thermal Cat-Back
Zex Nitrous Kit
Custom Cleared Taillights
Originally posted by jpprelude I drove starscream's VTEC, and my Si can't hold a candle to his, especially once VTEC kicks in.
bad ass wont it? i think i was the last one he let drive it
and if you did put vtec spec cams in a si it would suck ass. the damn thing wouldnt idle and would have no power below 4800. the vtec motor would pull way out off the line. and even if vtec dont make power like yall say who cares, it sounds coo and my automagic h22 is faster than the si's that i have raced......
bad ass wont it? i think i was the last one he let drive it
and if you did put vtec spec cams in a si it would suck ass. the damn thing wouldnt idle and would have no power below 4800. the vtec motor would pull way out off the line. and even if vtec dont make power like yall say who cares, it sounds coo and my automagic h22 is faster than the si's that i have raced......
what RPM do you launch at.. er.. nevermind u have an auto...but if u had a manual tranny you would probably be launching above 4500 and when u shift u shouldnt fall to far below that if at all
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1994 Prelude Si 5-Speed
AEM CAI
Thermal Cat-Back
Zex Nitrous Kit
Custom Cleared Taillig
uke:
get "the" turbo