Yeah it makes a lot of torque...its a good midrange grunt motor for sure.

I only run 3.36 gears and 27" tires, with a really tight 10" converter...but it hits pretty good in 1st gear... You can see in the videos while running the mustang, as soon as I hit it, it spins a bit from a 40 roll in 1st then it gets down... Even giving him the move and me spinning pretty bad on the last race, I still jump out ahead of him...until my **** runs out of fuel...

But she gets out ok for what it is....

 

Love the vette one sweet ride

 

Badass corvette!

 

I am a big block chevy fan FIRST. before my cadillacs, before anything.


a l-88/89 (generalization of open chamber and closed chamber rectangular port BBC) headed BBC is still the gold standard for power and torque.

consider 315cfm flow in 1967. nothing we drive today can make a genuine 550hp with headers only.

absolutely bone stock....manifolds, tune, air filter. 500hp/500tq. 427 inches.


I love 3rd gen best. I prefer a 1980 model, but I am old.


love how the car looks and runs man. BBC can match anything there is.

 

Thanks man!

Yeah this one is a pretty simple combo, but its scienced out pretty well..

496, 10.0-1, GM 049 oval port/open chamber heads, Isky 238/248 hyd roller. Built by VortecPro performance. He is the BBC guru for sure... These heads went 320 cfm on the good port, at only 270 ish cc. It made 657hp/670tq on an engine dyno here. I just have a lot of stuff on it that kills it in the car...(smaller headers, lots of accessories, heavy drive train components, T400 etc etc)... Makes right at 500 rwhp thru the auto. In reality, any late model H/C LS3 C6 should be able to outrun it....but hasn't happened yet...

Its been in the car for 8 years, 23k miles, probably ready to be refreshened but....it still runs good and compression is still right where its always been so.....I'm gonna keep running it til it pops, then I'll put a 565" in it..


Worked on my new fuel system this weekend.... This should be enough...

 

No reason why a paxton s550 shouldn't outrun a 127mph trapping car. Both having traction of course.

 

Probably not even a 127 car in this vid. It was running out of fuel with a bad pump

 

Sounds like LS7... modern day muscle with a baby stock cam making that power

 

That's paxton needs Jesus then. One of those slapping the kit on with the base map and goes running it kinda guy. Then wonders why it ain't moving.

 

Yeah, not even close to a 127 car in this vid... Front half was the same as usual....obviously, its dead in 3rd. Only on one of these did I stay in it all the way through and you can hear it nose over, then come back for a second, then nose over.... Probably a 122 pass at best on that one.

The car just has a good hit and I was getting out on him, he was definitely running me down if you watch my rear view mirror, you can see him coming on hard when I let out on 2 of the passes.. He was easily 4-5 mph faster then me, I just got there a lot sooner. I figure he traps 125. He is only on 9-10 psi with a Lund tune, logging/remote tuning with Ngauge.

I think 30-40 mph was a bad starting point for him....too fast for 1st, too slow for 2nd.

He just ordered a fuel system and is going full E85 and will tune it locally, I'm sure he'll make 700 when he is done and he'll rape me...LOL

 

So he makes ~550ishwhp

 

A friend back in high school built a replica l88. Only thing different was the heads had a mild clean up on them. Put it in a 71 z28 all steel car. Mind you this was around 1990 so none of the fancy tubular **** on it like most guys runs these days.....no race brakes....simple th400. Basically a bolt on l88. It went 10.6@126 if i remember right. I know the 10.6 part is right. .....mph might have been 128 tho.

We built some custom cobras at group44. Guy running the show Lanky Foushe biult a bbc for his. Stock oval ports nothing fancy with a mild hydraulic flat tappet and it made a little over 500 crank on our engine dyno. They're way easy to get power out of.

 

I’ve pulled on cars after the 1/8 that out trap me by a couple mph. I’ve also had cars stay at my bumper with a couple mph less trap.

My last switch to 26 tires picked me up 3 mph similar conditions. But only around a tenth in ET.

I don’t think it’s as simple as the faster trapping car wins the roll. Not every time

 

I agree....sometimes it's a gearing thing. Some cars leave really good then lay down and don't really carry that momentum out the back. Some cars don't get goin real good till after the 1/8. Just because 2 cars can run similar et's and mph don't mean they accelerate the same at all points on the track.

 

Third gens are pennies around here too...but then I'd need to grow a mullet .

 

Bad *** car

 

I completely agree. You can’t really go by trap speeds when gauging roll races. Some cars front half better, some cars back half better. Stick cars almost always back half better, yet trap the same or less as a similar modded auto car because the front half’s are usually much slower.

On average, decent power cars gain 25 mph on the back half, bigger power cars may gain 30+ on the back half depending on the converter.

My C5Z with the stick would gain 38 mph on the back half.. (110/148), after the auto swap it would only gain 30 mph on the back half, but trapped faster over all. (121/151) and that was with 100lbs more weight.

That same car out doing highway rolls with a buddy’s 144 mph GS would pull him, but not 6 mph faster, not even close. His car was more efficient in high gear.

Basically, all this roll racing BS is just ricer math anyway.

I’ve raced another buddy with a 12’ 5.0 A6 car with the Roush 2.3 blower in my 71’ and I pulled him about the same as the white 5.0, yet held 2-3 lengths on him passed the 1/4. That car ran 11.0@125 and made 550 rwhp.

Roll racing is pretty ****** gay anyway... I spank them all at the track. Lol..

 

I back halfed 24 and 26.5 back to back runs with nearly identical ET and trap. Thought that was weird

 

I don't think there are any rules or guidelines ultra.

You hear some guys say if your 60 gets better your trap goes down. Recently in anything goes thread 2 cars were posted that proved that wrong........not that it was right before that lol.

 

Yep and the other myth is .1 in 60’ = .2 in the 1/4....sometimes this is possible on slow cars but...on faster cars usually isn’t the case.

I also don’t buy the “quicker the 60’, the lower the mph”. At least not on 9-10 second cars that I’ve had and raced.

When I’m racing my bikes, a better 60’ almost always = a better mph because the 1/8 mph comes up so much, hence a better 1/4 mi mph.


Ultra, that 1 mph difference in back half could have been anything. Hell the trans could have shifted 100 rpms too early or late on the 3-4 or 4-5 shift and caused that 1 mph dip.

Hell I’ve ran into fog at the end of the track and slowed down a mph.