I'm wondering is anyone has traped 130mph on pump gas? If so what was your set up and how much boost were you running?

Thanks,
STEPHEN

 

Doubtful unless the vehicle in question weighed considerably less than in its respectively stock form.

B

 

Just to clarify, I'm talking about in a street car running street trim with no weight reduction mods.

Surely some of you have. We have 2 people on the forum that have run 125mph on stock twins and upgraded twins (BNR's) WHILE ON PUMP GAS. Surely there are some single turbo guys that are making enough to hit 130 on pump gas.......you guys just not go to the track or what?

STEPHEN

 

Steph...give me about 1-2 months and 130mph will happen on my soon to install single
Need to wait 'til all this snow melts away....

 

supras all day longgggg!

 

11.22@130mph on BFG drag radials.
88 TII, 2900lbs with driver.
510 rwhp at 20 psi on 93 octane..
13b secondary bridge port blow- thru holley carb!

 

thats awesome cris

 

On 93 octane? 100% 93 octane? Isn't that a little dangerous?

B

 

Chris, what size turbo was that on??? What did you do just run it real rich and retard the timing. Like would something around a 10.8 a/f with say 10 degrees timing be ok for 20psi on pump gas but a big *** single turbo?

 

Dont forget about the avg rwhp thru out the entire range. This is something I've been thinking about lately and I really feel its why our cars trap so high with just barely over 400rwhp. Its the avg hp across the entire range. My car avg 410rwhp across the entire shift range cause my (and your) hp curve is very flat for about 1500-2000rpms. Most of the single turbo graphs I've seen peak out instead of going flat like ours. Look around as some of the graphs on the forum and see which ones make an avg of 410 across the entire shift range. Most of the ones I found that made an avg higher than 410 were peaking right around 450rwhp.

Also, this going along perfectly with Chris saying his car made 510rwhp to trap 130 where as our cars ran 125 with 100rwhp less!!!

I was wondering if I was going to have to get all the way to 500+rwhp to trap 130's.....looks like I will and i just dont see that happening on pump gas......not with my stock lim, uim, and street port.

STEPHEN

 

Same a/f but timing was around 12 deg.
The turbo was a T-70/1.0/p-trim.
On that particular combination we were actualy able to run 22psi on 93 octane without any problems.
The same motor on 116 octane made 551rwhp at 26psi.
The TII 8.5:1 rotors are very forgiving with pump gas.

 

It's only dangerous when you don't have the right combination!

 

FYI Shell has new gas formula and its is changing its 93 octain to 94+. As an owner of a new style C store
I am in the New Orleans test market. Cincinatti is the other test market area. However , except for me they arent changing the 93 stickers on the pump. Shell wants to see how its new 'V'Formula works before going nation wide.Mine tested higher than the sticker rating by weights and measure who told me the pump decal is the minimum that it can be.

 

I'm not running the TII rotors. So with the higher compression 3rd gen rotors I guess I'd have to run lower boost....or could I get by at the same boost but with lower timing to help make up for the higher compression? I dont know which would be better to lower the boost or run the high boost with more conservative tuning?

STEPHEN

 

Steph, it's all in the tunning and turbo sizing......those two affect the power curve a great deal.
I would choose something smaller then a T-70 for the street and I'm sure 130 traps will be possible on pump gas(93-94octane).

We'll soon see....

JD

 

Yea, I know they do but I find it odd that almost every high hp dyno chart for twins has a fairly broad hp curve and most all the single turbo cars basically peak thier hp for just a few hundred rpms instead of for 1500rpms like our cars.

 

I run 1.3kg/cm with spikes to 1.4kg/cm (roughly 18-20psi) on pump gas. knock is teens to 30, with a one time peak to 67 (probably on decel, though I didn't see when it happened). AFRs <10.5 at WOT

 

What size turbo you running? And have you been to the track yet? What kind of mph you getting?

 

apex rx6, no track yet-afraid of tech inspection since I have an optima battery in the hatch that is not in a sealed box.

 

Only 1500rpms!
You have not seen a single dyno chart that have a broad power curve?
Actualy most of the cars I set up carry the power from 6500 to 8500 rpm with 9000 rpm redlines on a street port.

 

You'll be the first...

 

>11.22@130mph on BFG drag radials.
88 TII, 2900lbs with driver.
510 rwhp at 20 psi on 93 octane..
13b secondary bridge port blow- thru holley carb!<

Been done by one of Crispeed's cars.....

Time will tell.....

Funny, many said i was dreaming when I mentioned trying to trap 125mph on stock twins

 

Yea, one of Chrispeeds cars did it but it was with a secondary bridgeport and a T70 running at its pump gas max.

Chrispeed, I really havent seen many single turbo dyno sheets with a wide curve. probably the widest curve I've seen is Demetrious's (sp?) dyno sheet. I said 1500rpms for my car but it might be more, it starts right around 6000 and it carried to to 7500 where I ended my dyno. It wasnt dropping off at 7500 though so I'd imagine it would keep going.

Cris - Do you have any idea (I'm sure you do) as to how the T70 would be on a large street ported engine in terms of daily driving. Is it real laggy? What rpm do you speculate it would hit 18psi of boost? I'm under the impression its going to be what I would consider pretty laggy.....that would be not hitting 18psi till 4500+. When you got the 130 on pump gas were you running the stock lim, uim, tb? If so were they 3rd gen or 2nd gen manifolds and were they ported a lot?

Then even with a T70 with me only having a street port I'm not sure I'd be able to get that kind of power on pump gas and stock 3rd gen rotors

Decisions, decisions, decisions haha

STEPHEN