Generation IV Internal Engine - ALZILZIL RACING - Bulding RHS 491 tall deck

Hi , , , ,

the first time we built this engine for a customer with Hydurulic roller camshaft Bullet racing custom , Actually i forget the duration but it has 640/640 on 1.8 rockers ratio

Stroke 4.500
Rods 6.300
Bore 4.165

Heads Are Mast LS7 305 intake runners

It pulled 640rwhp N/A and 1000RWHP with two stages , Fitst stage was 300 through direct port system , Second stage was dry 100HP through one nozzle .

Motor Has 13:100CR

Tall deck 9.750
https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-snc6/262396_177326542328361_3975335_n.jpg

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/285183_198802640180751_958259_n.jpg

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/294405_201113353283013_918929_n.jpg


Now customer need more power and we got him Custom Solid roller 770lift with 1.8 ratio 282/298 114LSA Cammotion from Late model Engines ( Thanks
for Bryan Neelen for help )

We done the shortblock , After measuring we seen it needs 9.350 pushrods length
https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/522661_329805450429267_54890541_n.jpg

Also we changed to solid morel lifters , Comp springs 780lift

Engine should be ready when pushrods come in .

Let me know if you have any questions ......

Thanks in Advance , Alzilzil .

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Mohammed Alzelzellah .

Numbers n/a seem low for the cubes and the compression to be honest. Certainly nothing to brag about. 491 cubes and 13:1 should make a lot more power than that

The torque number is pretty impressive. I would of thought a little more hp also but the long stroke motors don't seem to perform. Did I miss what intake was on it?

LOL stroke doesnt matter, its who builds it that does. its lacking something for sure..

Numbers n/a seem low for the cubes and the compression to be honest. Certainly nothing to brag about. 491 cubes and 13:1 should make a lot more power than that
I kinda was thinkin' the same thing??

The torque number is pretty impressive. I would of thought a little more hp also but the long stroke motors don't seem to perform. Did I miss what intake was on it?

He didn't even list the torque number. The 640/640 was in reference to the lift of the hydraulic cam.

Let's see what info he comes back with. Maybe it's through a large stalled auto and it could have a ls7 manifold choking it down. It probably would have made peak power at a very low rpm if that's the case. I would love to see a dyno graph, I'm sure the tq is through the roof.

opps I miss read the post. I will disagree about the long stroke motors. When I was building my 454. I talked to eric at hke and he talked me out of doing a unsquare motor. Erl has the 500 and rhs has the 502. I have not seen any of them out perform the 468 on the track.

opps I miss read the post. I will disagree about the long stroke motors. When I was building my 454. I talked to eric at hke and he talked me out of doing a unsquare motor. Erl has the 500 and rhs has the 502. I have not seen any of them out perform the 468 on the track.

Erik does them all the time, he has a 503 going into a magazine and he himself will tell you cubic inches are cubic inches unless your talking about a power adder then he only likes so much stroke due to the piston strength..
The 468 is his build as well as the 457

Let's see what info he comes back with. Maybe it's through a large stalled auto and it could have a ls7 manifold choking it down. It probably would have made peak power at a very low rpm if that's the case. I would love to see a dyno graph, I'm sure the tq is through the roof.
Agreed but with 13:1 and 491 cubes at 640 rwhp even with a th400 and 9" isnt that good is my thought

I know that's low #'s on that 491ci and sorry didn't mentioned that in the first post , The motor running on a 2006 C6 ZO6 , We built many engines and give the customers the advices on which intake and exhaust systems they should run with , But he's running 1 7/8 headers and we told to run 2inch headers , We seen 40-50rwhp from 1 7/8 to 2inch headers on big cubic inch motors , He sprayed 400hp around 50 times on this motor and running all good , But now he need more power , We got him 2 inch headers and solid roller , He Should put down +750rwhp at least N/A , And gonna install second foggers kit on the fast intake .

Also the yellow ZO6 raced the fastest cars in kuwait and nobody can beat those cars , THE 491 beat them with 300shot

He has alot of fans too :D

No one can beat this porsche gt2 TT +1000rwhp , THE RHS 491 did it :)
http://www.youtube.com/watch?v=9CjYzKOAcRA
http://www.youtube.com/watch?v=BBgmEKDxjVE

With C6 ZO6 and two stages of nitrous 441RHS
http://www.youtube.com/watch?v=09-azj7IEb4
http://www.youtube.com/watch?v=n9JcKMjLejQ

with C6 ZO6 RHS 454
http://www.youtube.com/watch?v=h1dhqTJP5W0

Nitrous is the great equalizer :)

should be a big nasty motor

why dont they turbo the shit my buddies 370 made 1231 hp runs 8.70 all day and he daily drives it ! http://youtu.be/u8BQpkWd8TA
http://youtu.be/E-cj7paJzxY

And its 102 her today !

We do not build boosted cars because for a lot of reasons headache , hot weather .... etc
This RHS beat LSX427 with procharger with no competition

We finished the long block and put Crower 1.8 adj rockers

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/s720x720/481964_391066024287744_1758130105_n.jpg

Dyno #'s soon when customer install engine and tune good luck for him .

If you are still running it through a FAST intake I would be absolutely floored with 750whp. The fast is going to straight choke this engine.

I think some of you guys have no idea what you're talking about!

The car obviously has some restrictions before that they are dealing with now!

That is one bad ass motor!

If you are still running it through a FAST intake I would be absolutely floored with 750whp. The fast is going to straight choke this engine.

If this mine i would do MAST LS7 2 piece intake with 4500 four barrel throttle

Customer wanna install second stage of direct port system .

Car gets down I wouldn't change a thing.

http://www.youtube.com/watch?v=ZWsrEbwEnHo&feature=plcp

http://www.youtube.com/watch?v=ZWsrEbwEnHo&feature=plcp

nice build but what is the new dyno # after putting new custom cam ?

Awesome motor!

We're going to change the intake from Fast 102 to Mast LS7 2 piece with 4500 four barrel throttle and dyno .

We're going to change the intake from Fast 102 to Mast LS7 2 piece with 4500 four barrel throttle and dyno .

Very good idea. That thing is a monster.

Any updates? Cant wait to see the result!

updates?

any update ?