[PICS] The BADDEST Street Attack 500 to date 701hp/677tq NA on 11:1CR & pump gas!

[Katech_Jason]

Here is what it takes to make a true 700hp, 11:1 compression, pump gas engine without any funny business. Keep in mind that this is a 500ci engine with a 4.500" stroke so we are not revving it very high either.

Street Attack 500
Custom camshaft - a little more aggressive but still streetable, still hydraulic
Kinsler crossram manifold - makes it less streetable
11:1 compression
March front drive
Katech carbon fiber valve covers (prototype pictured)
Show prepped intake runners, valley cover, water pump, oil pan - Atomic Orange
Painted engine block/heads

Going in a 1963 Corvette

To be featured in Vette Magazine








You may ask why the dip in the torque curve. It is related to camshaft/intake/calibration. We may be testing more with a Motec to tune that out a little better. Keep in mind that the "dip" is still over 650 ft-lbs at its lowest point.



This engine makes our Desert Attack 500 look very promising. Imagine 14:1 compression, more aggressive camshaft, and a Kinsler vertical manifold. 750hp/750tq here we come!

[MonmouthCtyLS7]

, Nice motor

[LS6427]

whats the price tag on an engine like that?

I know there's probably more power in it, but I would have thought 800fwhp would come from that big engine and with that killer intake.

[Katech_Jason]

Originally Posted by LS6427

whats the price tag on an engine like that?

Why do I feel like this is a loaded question?


This one came in at $51k.

[dkbykesdk]

Originally Posted by Katech

Why do I feel like this is a loaded question?


This one came in at $51k.

i just came up there yesterday an bought rod bolts, you couldnt show me this!

[99bowtieZ]

Originally Posted by Katech

Why do I feel like this is a loaded question?


This one came in at $51k.

Or maybe you have to be loaded to consider asking that question...? That intake is sick.

[Katech_Jason]

Originally Posted by dkbykesdk

i just came up there yesterday an bought rod bolts, you couldnt show me this!

LOL. Sorry. Its still on the dyno today if you want to stop by.

[Juiced]

Great looking motor and great power.

I hope those orange push-lok lines get traded out for Braided at a bare minimum, color matched hardlines would be nice.

[Katech_Jason]

Originally Posted by Juiced

Great looking motor and great power.

I hope those orange push-lok lines get traded out for Braided at a bare minimum, color matched hardlines would be nice.

For sure. Those are for dyno only. The car will get something much prettier. We just don't want to scratch those all up on the dyno.

[LS1-NAVY]

wow thats sexy

[ZZebes]

well there goes this pair of shorts

that is pure sex guys

[99blancoSS]

sweet !! That Kinlser isn't a small dollar item...

[LS6427]

Originally Posted by Katech

Why do I feel like this is a loaded question?


This one came in at $51k.

Another un-loaded question or two.

What size ITB's are those in mm's?

What does that intake alone cost with all the required linkages and extras?

[Katech_Jason]

Originally Posted by LS6427

Another un-loaded question or two.

What size ITB's are those in mm's?

What does that intake alone cost with all the required linkages and extras?

Its an oval. Equivalent to 2 3/8" round in area.

About $7000 with everything - fuel rails, MAP/IAC log, TPS, trumpets, screens.

[slammer454]

for the love of god.......

Simply amazing, especially the torque curve, even with the dip that's a true stump puller!

How hard has it been to get the ITB's dialed in? I've heard they are a b*tch to tune but once right it far outweighs anything else.

[ss1]

Excuse my ignorance, but what do you run for air filters on that thing on the street?

[Katech_Jason]

Originally Posted by slammer454

for the love of god.......

Simply amazing, especially the torque curve, even with the dip that's a true stump puller!

How hard has it been to get the ITB's dialed in? I've heard they are a b*tch to tune but once right it far outweighs anything else.

Two days on the dyno getting it right...it can only go to a certian point. The car is a show car/rarely driven.

Originally Posted by ss1

Excuse my ignorance, but what do you run for air filters on that thing on the street?

Once the customer gets the engine, they will be building airboxes to contain the runners. That is where the filters will be housed.

[texas94z]

How much power would a solid roller race gas Street Attack 500 make???

[LS6427]

Originally Posted by slammer454

How hard has it been to get the ITB's dialed in? I've heard they are a b*tch to tune but once right it far outweighs anything else.

I don't know about the Kinsler. But I've been talking with a guy that just got done with his 454ci LSX and the Harrop 55mm ITB intake. He said it was very easy to tune. I've seen videos of it idling and revving, smooth as silk.

[LS6427]

Originally Posted by Katech

Its an oval. Equivalent to 2 3/8" round in area.

About $7000 with everything - fuel rails, MAP/IAC log, TPS, trumpets, screens.

So about 60mm.

Do you have an opinion on whether or not an ITB intake will make more power than any single TB sheet metal intake?