C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Sep 10, 2009 | 01:32 AM
  #41  
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Wow
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Old Sep 10, 2009 | 02:39 PM
  #42  
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Originally Posted by thetoy
Well got the car running this weekend and just got back from tom wong's shop to do some tunning and a couple of dyno pulls. All I can say is WOW!!! This thing pumped out 648 RWHP and 554 FT-lb of torque on his dyno after a little bit of tunning. It had over 500 ft-lb's of torque starting @ 3500 rpm's. I still have the stock miniram on it and now am not sure if I really need more power from a good intake? Just thought I would give a quick update I need to go change the oil now.http://s250.photobucket.com/albums/g...dynosheet2.jpg
That is some crazy power there......

So what's the secret?
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Old Sep 10, 2009 | 06:12 PM
  #43  
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Originally Posted by 88BlackZ-51
That is some crazy power there......
So what's the secret?

No secret, cubic inches, good flowing heads, and a large SR.
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Old Sep 10, 2009 | 08:40 PM
  #44  
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Peaking at 6800rpm helps too! (Of course due to the high flowing heads, short runner intake and cam)

You can make that much torque, but it would be harder to duplicate that hp at lower RPM.
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Old Sep 10, 2009 | 11:50 PM
  #45  
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Originally Posted by Orr89rocz
Yeah sounds like you could try a ported out raise runner carb manifold converted to EFI to get some more flow to those heads... elbow design however will determine power from there on out as some designs dont make power from what i've seen from some lsx guys posts. COuld do a MPFI style TB and open element air filter like a carb setup.

Either way those are incredible numbers. What tranny is that through?
It's got the stock 6-speed that came in the car I haven't had to touch it yet but I'm thinking that might change shortly. I am going to try it out this weekend and see what breaks next. I'm thinking I need to start thinking about a stronger rear end. I will be auto-crossing all weekend and trying a little bit of drifting (which I suck at). It's called the smackdown which is being held at packwood washington. There will be about 8 different car clubs competing against each other. Each team must pick there best three drivers and they will all have to autocross,drift, and about a 600 ft drag race across a parking lot which I got beat last year buy all the modded all wheel drive cars. I never could hook up on the parking lot I just kept leaving two black marks the entire length of the course. I ended up cording both of my et slicks.
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Old Sep 10, 2009 | 11:58 PM
  #46  
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Toy very cool motor there. Wish I would have went bigger cu. in. I like the T&D rockers and the monoblade TB Did you think of going to the FAST system at all? Or using SB 2 heads. Is your block the Dart Iron Eagle? Pipe
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Old Sep 11, 2009 | 01:20 AM
  #47  
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Originally Posted by thetoy
It's got the stock 6-speed that came in the car I haven't had to touch it yet but I'm thinking that might change shortly. I am going to try it out this weekend and see what breaks next. I'm thinking I need to start thinking about a stronger rear end. I will be auto-crossing all weekend and trying a little bit of drifting (which I suck at). It's called the smackdown which is being held at packwood washington. There will be about 8 different car clubs competing against each other. Each team must pick there best three drivers and they will all have to autocross,drift, and about a 600 ft drag race across a parking lot which I got beat last year buy all the modded all wheel drive cars. I never could hook up on the parking lot I just kept leaving two black marks the entire length of the course. I ended up cording both of my et slicks.
You'l never hook a motor like this on street type road surfaces.. just have to throttle out of it and accelerate at a slower pace than what its capable of. I broke loose at 45 mph rolls on nitrous sprays and i only pushed 520-ish whp. i cant imagine 684 on motor
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Old Sep 11, 2009 | 03:12 PM
  #48  
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Originally Posted by mnstrlt1
I am completely aware that the cam and intake manifold would need to be changed, but also the headers (since the 18/15 degree profile would also alter the angle of the exhaust ports.

it would just be cool to see if there is anything left in the package.

what did your 434 make (not to go too off topic).
I tried to have it dyno about 4 years ago, it just kept breaking loose. When rpm goes up slowly no problem, the moment that you punch it, the rpm flys up so fast and the tire smoke, This combination is basically a 1/2 mile sprint car engine at 11.5:1 and fuel injected. This was main thing I wanted from this combinationation was around 650 ft./lbs. of torque around 5500 - 6000 rpm, my redline is 7500.
The turner drove it around the neighborhood and all of the car alarms went off, the pressure wave is nothing that I am used to. According to of the guys that are sprint car racer that is normal for cam on 106. But they can't seem to understand why would I want to drive this on the street when this engine was meant to run on a oval track. The head intake port is 262, Please unleash that extra 35 cfm that would be about 700 horsepower at the wheels. Then go and hunt down a few Vipers, there was one that spanked me really good about ten years ago, after rear end swap next year, it hunting season.
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Old Sep 11, 2009 | 03:23 PM
  #49  
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Originally Posted by thetoy
No I didn't see that post. What was it?
I have a different approach to your intake issue, check this out. I am considering this for a 468 small block for my future plans. It is about using a 18 degree intake with the allpro heads, I also have a set, and a 4.250 stock crank, plus a set of 4.155 a Ross piston for a Chevy 2 that I want to build. I find that buying parts and putting then on the shelf doesn't hury my nonexisting bank account so much.

http://www.yellowbullet.com/forum/sh....php?p=1185919
http://www.yellowbullet.com/forum/sh...ad.php?t=99576
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Old Sep 11, 2009 | 06:09 PM
  #50  
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Originally Posted by yedister
I have a different approach to your intake issue, check this out. I am considering this for a 468 small block for my future plans. It is about using a 18 degree intake with the allpro heads, I also have a set, and a 4.250 stock crank, plus a set of 4.155 a Ross piston for a Chevy 2 that I want to build. I find that buying parts and putting then on the shelf doesn't hury my nonexisting bank account so much.

http://www.yellowbullet.com/forum/sh....php?p=1185919
http://www.yellowbullet.com/forum/sh...ad.php?t=99576
Both times you have placed the links up they did not work. Could you be specific as to what you were referencing?
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Old Sep 12, 2009 | 07:11 AM
  #51  
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Originally Posted by AKS Racing
Both times you have placed the links up they did not work. Could you be specific as to what you were referencing?
Sorry about that, this is a conversation on using certain18 degree intakes on Allpro 245 heads from people who have done this conversion, it could be a source to contact to get more info. When I get to the point of using the Allpro set that I have, I'll going to use a modified tunnel ram intake. The links below works, I tested them.

http://www.yellowbullet.com/forum/sh...ght=allpro+245

http://www.yellowbullet.com/forum/sh...take+on+allpro
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Old Sep 12, 2009 | 10:13 PM
  #52  
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Originally Posted by yedister
Sorry about that, this is a conversation on using certain18 degree intakes on Allpro 245 heads from people who have done this conversion, it could be a source to contact to get more info. When I get to the point of using the Allpro set that I have, I'll going to use a modified tunnel ram intake. The links below works, I tested them.

http://www.yellowbullet.com/forum/sh...ght=allpro+245

http://www.yellowbullet.com/forum/sh...take+on+allpro
You are correct, the links do work! That second link is quite informative. I have bookmarked....
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Old Sep 12, 2009 | 10:37 PM
  #53  
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On the YB thread - hopefully you noticed the comment that there are no "good" 18 degree intakes to start with. Any of the 18 degree intakes are going to take significant porting work to work well. None of those intakes are designed to be bolted on out of the box.

I bought a Brodix 1006 for the 10x raised runner heads I got. Intake that Brodix specs for those heads. Still had to weld up the tops of the manifold to head flange to get the ports to line up. That probably had something to do with the CNC program that was run on them. Then had to have the intake ported.

And not to take away from the origninal thread - Damn !!!
Congrats to everyone involved in that project. That's the strongest NA combination I can remember seeing on C4 tech. You had some good cooks in that kitchen.
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Old Sep 13, 2009 | 11:33 AM
  #54  
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Originally Posted by SloRvette
On the YB thread - hopefully you noticed the comment that there are no "good" 18 degree intakes to start with. Any of the 18 degree intakes are going to take significant porting work to work well. None of those intakes are designed to be bolted on out of the box.

I bought a Brodix 1006 for the 10x raised runner heads I got. Intake that Brodix specs for those heads. Still had to weld up the tops of the manifold to head flange to get the ports to line up. That probably had something to do with the CNC program that was run on them. Then had to have the intake ported.

And not to take away from the origninal thread - Damn !!!
Congrats to everyone involved in that project. That's the strongest NA combination I can remember seeing on C4 tech. You had some good cooks in that kitchen.
There is a aspect that comes into play here, the block height 9.325 which changes the head to intake angle which a 18 degree intake could be utilized. The 2 piece intake would be a nice but might pose a problem with hood height, but the flow angle would be straighter to the the port. I had my miniram modified from a 23 degree to 15 degree for my 434.
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Old Sep 13, 2009 | 12:41 PM
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Originally Posted by SloRvette
On the YB thread - hopefully you noticed the comment that there are no "good" 18 degree intakes to start with. Any of the 18 degree intakes are going to take significant porting work to work well. None of those intakes are designed to be bolted on out of the box.
I find the comments on the 18° intakes interesting. I still have a set of very nice 18° heads with matching intake (fully ported and flowed). The heads flowed right over 370cfm at 0.650". A few years ago I had plans to convert the intake to FI and then see what that could do (I had thought I could see 625+WHP NA with a 9.4SCR). I had planned to use these on something like a 424CID, and then add boost.

Time has gone on, and I still have yet to do this... Maybe oneday???
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Old Sep 13, 2009 | 02:11 PM
  #56  
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I'd be interested to see how that 18 degree combination would work Aaron. How big are the chambers on the heads that you've got ? What castings ?
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Old Sep 13, 2009 | 02:20 PM
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Originally Posted by SloRvette
I'd be interested to see how that 18 degree combination would work Aaron. How big are the chambers on the heads that you've got ? What castings ?
I believe that they are 52cc chambers, and they are the Chevy 18° Hi-port heads. Here are some pics...




And completely assembled with the Jesel shafts...

Aaron
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