Chuckles

Please don't let this turn into a "SC sucks" post!

I got my first ride in an JRSC ITR tonight. It is rough tuned and makes right at 200whp. Not bad, but nothing too exciting. The blower whine was neat and power below 5000 rpm was something new to me.

I've been doing some research on blowers lately and it appears that many cars making 205-220whp aren't much faster (1/4 mi) than a good NA set-up making <200 whp. Why is this?

It seems that a lot of SC & NA Tegs run mid-high 13's on street tires. I'm not taking interior weight into account. Yet, with a higher tq curve and more power, you would think the SC would kill a NA set-up. Does the difference in tq peak make a difference?

Please help me understand?

rjardy

Well ya think about it, more air and fule into the combustion chamber = more BHP, so of course a SC teggie would walk on a teeggie with just the normal bolt ons (i/h/e) hth

Etylorcen

He's talking about a 200hp na car and 200 hp sc'd car. I've been wondering this myself. Its gotta be the powerband but cuz someone enlighten us w/ details?

rjardy

oh i understand now, must be the torque curve right??? anyone?

Chuckles

Exactly guys...now you understand my question.

In doing some research, it seems that a blower moves the peak tq down in the powerband. If I recall right, I think I've seem most peaking around 5500-5600 rpms. In my NA set-up, peak was around 6800. I'm wondering if the combination of this and gearing puts the SC at a disadvantage in the ITR? Anyone else got an opinion?

GSRwBOOST

The increase in torque is what gets them to pull ahead of an N/A teg.. it's the ability to maintain that when the torque levels out and the hp is climbing...

both are related, but it's torque that gets you out of the hole... the quarter mile speeds might not be that much different, but if you think about it.. two top fuel dragsters are rocketing down the 1320.. and one is .025 seconds behind the other one... which if you look at the time and the distance they are behind.. it's a BIG difference...

there was a test done with 3 cars.... 1 n/a 1 sc and 1 turbo..

the turbo came in first, s/c second and the n/a last.... s/c got off the line faster but was reeled back in just as fast.... and as for the n/a car... it got a respectable time... not sure what issue of scc or whatever that was in.. but it SEEMED like a fair test....

chri5

Also, keep in mind that most NA cars making 200+hp are revving to 9000rpms and beyond. This is going to allow them to stay in a given gear for a longer period of time compared to the SC car.

jinxproof99

a friend of mines n/a civic(dynoed 210 to the wheels)went 12.05 at 113 mph. his car weighted around 2300 with him in it. that was on 22" slicks. my old civic w/gsr and s/c dynoed 225 to the wheels and on drag radials only hit 108mph. my car was only 100 pds heavier. there is no way in hell i would have gone any faster than 12.50-12.60 with that car(on slicks). his car is a b20vtec so he has a great torque curve. thats what gets him there. along with his 113 mph(i don't know where he got that from...hahaha) bastard b20's. lol.

oh yeah, he revved to somewhere around 8500 and i revved to like 8100.


[Modified by jinxproof99, 2:15 PM 3/3/2002]

2000_Civic_Si

My anaolgy! I Belive the reason for a 200hp N/A Car, runs almost as fast as a 200hp SC'd Car is because if traction. It is all in the power curve. The supercharger makes full torque at like 2,000rpm. And keeps it till ruffly 7,000rpm. The NA car doesnt start making the power till later in the rpm's. Meaning that with all that power down low on the SC'd Car they are going to spin much more off the line. You give both cars Slicks and see the 1/4mile time diffrence. The N/A car won't benifet the use of the slicks as much as the SC'd car. Well thats just my opinon. Now if you don't mind I am going to have a .