Finally decided! New engine combo!
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Joined: Nov 2001
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Finally decided! New engine combo! Hi all,
Well I had a good chat with Nick about the cars plans for next season. Here is what we have decided to do <img src="gr_stretch.gif" border="0">
I am very excited <img src="gr_stretch.gif" border="0">
Going to pull my heads and cam and go with the following.
5.3 liter truck heads with 2.02/1.60 valves, aggressive port work, 11.2:1 compression, double springs, tit retainers etc etc.
226/234 112LSA 566 lift camshaft. (It is a big bitch haha)
ASP crank and alt UD pullies
nitrous head gaskets and head bolts.
6600 rev limit for now with HPP programming
Going to keep my MAC headers and use an offroad pipe with bullets in the muffler with 3 inch cutout in the intermediate pipe.
Not going to get into predictions but it is going to run FAST this year <img src="gr_stretch.gif" border="0">
Also I am picking up new rims and slicks and dropping approx 130 pounds of weight from the car for the track.
Raceweight should be in the 3450 range with my 190 pounds carcass in the car.
Going to keep the 4.11's, spool, and TP4400 converter alone.
What do you guys think? Should run some good numbers <img src="gr_stretch.gif" border="0">
Cheers,
Chris
Well I had a good chat with Nick about the cars plans for next season. Here is what we have decided to do <img src="gr_stretch.gif" border="0">
I am very excited <img src="gr_stretch.gif" border="0">
Going to pull my heads and cam and go with the following.
5.3 liter truck heads with 2.02/1.60 valves, aggressive port work, 11.2:1 compression, double springs, tit retainers etc etc.
226/234 112LSA 566 lift camshaft. (It is a big bitch haha)
ASP crank and alt UD pullies
nitrous head gaskets and head bolts.
6600 rev limit for now with HPP programming
Going to keep my MAC headers and use an offroad pipe with bullets in the muffler with 3 inch cutout in the intermediate pipe.
Not going to get into predictions but it is going to run FAST this year <img src="gr_stretch.gif" border="0">
Also I am picking up new rims and slicks and dropping approx 130 pounds of weight from the car for the track.
Raceweight should be in the 3450 range with my 190 pounds carcass in the car.
Going to keep the 4.11's, spool, and TP4400 converter alone.
What do you guys think? Should run some good numbers <img src="gr_stretch.gif" border="0">
Cheers,
Chris
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From: new england
Re: Finally decided! New engine combo! Chris, do 5.3 heads have closer valve centerlines?
Also doesnt smaller chamber encrouch valves hurting airflow? It seems like if you unshroud 5.3 heads to help flow youll end up with 5.7 chamber size. Whats the deal?
Also doesnt smaller chamber encrouch valves hurting airflow? It seems like if you unshroud 5.3 heads to help flow youll end up with 5.7 chamber size. Whats the deal?
Thread Starter
TECH Senior Member
Joined: Nov 2001
Posts: 10,341
Likes: 1
Re: Finally decided! New engine combo! I am not sure on the answer to your question but I will find out for you. Maybe someone who runs a 5.3 liter head could lend some insight untill I can talk to Nick.
Thanks again,
Chris
PSJ, I am going to pick up a set of Centerline Convo Pros I believe in 15x7.5 and run a Hoosier 26x 9 inch slick.
Cheers <img src="gr_grin.gif" border="0">
[ January 24, 2002: Message edited by: Chris ARE 360 ]</p>
Thanks again,
Chris
PSJ, I am going to pick up a set of Centerline Convo Pros I believe in 15x7.5 and run a Hoosier 26x 9 inch slick.
Cheers <img src="gr_grin.gif" border="0">
[ January 24, 2002: Message edited by: Chris ARE 360 ]</p>
On The Tree
Joined: Dec 2001
Posts: 154
Likes: 0
From: Burlington, ON
Re: Finally decided! New engine combo! You are going to love that camshaft! It is the same one I have had in my car for the past year. It sounds nice and lumpy and makes some great power. <img src="gr_grin.gif" border="0"> I think it is a good thing you got the big *** 4400 converter though!
Do you ever come down to St.Thomas to run? Maybe we will run into one another there or at ARE sometime. My car will be at ARE for probably the end of February and beginning of March for a new motah! <img src="gr_stretch.gif" border="0">
[ January 24, 2002: Message edited by: MattG ]</p>
Do you ever come down to St.Thomas to run? Maybe we will run into one another there or at ARE sometime. My car will be at ARE for probably the end of February and beginning of March for a new motah! <img src="gr_stretch.gif" border="0">
[ January 24, 2002: Message edited by: MattG ]</p>
Thread Starter
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Joined: Nov 2001
Posts: 10,341
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Re: Finally decided! New engine combo! Yep I ahve been to St Thomas about 4 times last year <img src="gr_stretch.gif" border="0">
I will definitely be out this year <img src="gr_stretch.gif" border="0">
did you get custom programming done with your combo?
Thanks,
Chris
I will definitely be out this year <img src="gr_stretch.gif" border="0">
did you get custom programming done with your combo?
Thanks,
Chris
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Re: Finally decided! New engine combo! Damn, you change your mind more than ProStock John used to, and almost as much as JS <img src="gr_grin.gif" border="0">
11.1X @ 122 (1.51) is my guess. Damn A4 guys!
Tony
11.1X @ 122 (1.51) is my guess. Damn A4 guys!
Tony
Re: Finally decided! New engine combo! WOW!
Tony is on his 3rd cam, and shooting for a 3rd engine, he's catching up to ME! <img src="gr_stretch.gif" border="0">
John
2 sets of heads
5 cams
2 blocks
3 converters
1 rearend
3 gears
3 sets of headers
Tony is on his 3rd cam, and shooting for a 3rd engine, he's catching up to ME! <img src="gr_stretch.gif" border="0">
John
2 sets of heads
5 cams
2 blocks
3 converters
1 rearend
3 gears
3 sets of headers
TECH Addict
Joined: Dec 2001
Posts: 2,298
Likes: 2
From: new england
Re: Finally decided! New engine combo! If i had that much into my car i'd be living on the street!$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ <img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />
On The Tree
Joined: Dec 2001
Posts: 154
Likes: 0
From: Burlington, ON
Re: Finally decided! New engine combo! [quote]Originally posted by Chris ARE 360:
<strong>Yep I ahve been to St Thomas about 4 times last year <img src="gr_stretch.gif" border="0">
I will definitely be out this year <img src="gr_stretch.gif" border="0">
did you get custom programming done with your combo?
Thanks,
Chris</strong><hr></blockquote>
Yah I like St. Thomas on Friday nights. They let 11 second runs without rollbars slide without any probs. Let me know when you go next..
As for the programming, yes ARE did a program for the 226/234 cam and stage 2 heads on my car. It idles at 1000rpm, doesnt have any problems cruising in 6th at 1700rpms down the highway, and is actually very streetable. I know there is one guy somewhere out there that has that cam in an A4 with a 4400 stall like you and loves it. I think he made over 400rwhp on his A4 with this cam and stage 2 LS1 heads... Not too shabby.
<strong>Yep I ahve been to St Thomas about 4 times last year <img src="gr_stretch.gif" border="0">
I will definitely be out this year <img src="gr_stretch.gif" border="0">
did you get custom programming done with your combo?
Thanks,
Chris</strong><hr></blockquote>
Yah I like St. Thomas on Friday nights. They let 11 second runs without rollbars slide without any probs. Let me know when you go next..
As for the programming, yes ARE did a program for the 226/234 cam and stage 2 heads on my car. It idles at 1000rpm, doesnt have any problems cruising in 6th at 1700rpms down the highway, and is actually very streetable. I know there is one guy somewhere out there that has that cam in an A4 with a 4400 stall like you and loves it. I think he made over 400rwhp on his A4 with this cam and stage 2 LS1 heads... Not too shabby.
Re: Finally decided! New engine combo! Look at all the love in this post <img src="gr_grin.gif" border="0">
Now i must go back to changing my mind and making Julio crazy..
Frosty with traction 10's r possible for sure
Good luck with the setup buddy
JS
Now i must go back to changing my mind and making Julio crazy..
Frosty with traction 10's r possible for sure
Good luck with the setup buddy
JS
Re: Finally decided! New engine combo! What made you decide to keep the MACs? I thought you were going to go full L-T and get hookers.
I would think about some FLPs. The extra torque from LTs in the 4000 rpm range goes straight to the converter at launch, reducing your 60' time.
I would think about some FLPs. The extra torque from LTs in the 4000 rpm range goes straight to the converter at launch, reducing your 60' time.
Thread Starter
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Joined: Nov 2001
Posts: 10,341
Likes: 1
Re: Finally decided! New engine combo! I have seen too many cars dynoing really high with the MAC setup. Even an MTI 422 dynoed over 500RWHP through macs and the stock MAC Ypipe.
I am not sure it is worth the extra cash considering I have a 4400 stall. If it gave me 20RWHP from 4500-6600 I would definitely do it. But 4-5RWHP is definitely not worth it for me. If I were do to any long tubes, it would be hooker with a custom YPipe.
I may modify my existing offroad Ypipe with a dual 2.5 into 3.5 inch collector and run a 3.5 inch cutout back into the 3 inch int pipe.
Cheers,
Chris
I am not sure it is worth the extra cash considering I have a 4400 stall. If it gave me 20RWHP from 4500-6600 I would definitely do it. But 4-5RWHP is definitely not worth it for me. If I were do to any long tubes, it would be hooker with a custom YPipe.
I may modify my existing offroad Ypipe with a dual 2.5 into 3.5 inch collector and run a 3.5 inch cutout back into the 3 inch int pipe.
Cheers,
Chris
Re: Finally decided! New engine combo! [quote]Originally posted by Chris ARE 360:
<strong>
I am not sure it is worth the extra cash considering I have a 4400 stall. If it gave me 20RWHP from 4500-6600 I would definitely do it. But 4-5RWHP is definitely not worth it for me. </strong><hr></blockquote>
Do not underestimate midrange torque for a good 60' with an A4. Consider what happens at launch given that you do not have a transbrake. You can not footbrake to higher than 3500 rpm. When you launch, you engage the converter at a much lower rpm than its rated stall; it is under load as the output shaft is starting to rotate and doesn't instantly flash to 4400. Torque produced at 3800 (+/- 200) is important to your launch.
<strong>
I am not sure it is worth the extra cash considering I have a 4400 stall. If it gave me 20RWHP from 4500-6600 I would definitely do it. But 4-5RWHP is definitely not worth it for me. </strong><hr></blockquote>
Do not underestimate midrange torque for a good 60' with an A4. Consider what happens at launch given that you do not have a transbrake. You can not footbrake to higher than 3500 rpm. When you launch, you engage the converter at a much lower rpm than its rated stall; it is under load as the output shaft is starting to rotate and doesn't instantly flash to 4400. Torque produced at 3800 (+/- 200) is important to your launch.
Re: Finally decided! New engine combo! [quote]Originally posted by LS1derfull:
<strong>Chris, do 5.3 heads have closer valve centerlines?
Also doesnt smaller chamber encrouch valves hurting airflow? It seems like if you unshroud 5.3 heads to help flow youll end up with 5.7 chamber size. Whats the deal?</strong><hr></blockquote>
A 1.60 exaust valve would literally touch the outside of the cylinder head wall. But, the 5.3 heads are not merely a shrouded 5.7 head. The chamber shape is slightly different and more of a closed chamber design. When using the 5.3 heads, the outside of the chambers need opened up to the bore size for maximum flow. It will open up the chambers a little, but they still will be considerably smaller than the 5.7 heads and they will result in better airflow by unshrouding the valves. Rest assured that the 5.3 heads are the way to go.....but it's also more work.
Chris:
That's a killer combo. But, I'm wondering why you would need the larger 1.60 exaust valves vs. 1.57's AND a split pattern cam. A decent port job on the exaust side should flow around 230cfm. Considering the restriction of the intake manifold, I'm sure the e/i ratio would exceed 80% anyway with the 1.57 valves. It seems like to me that some of the intake charge could be pulled out through the exaust. Just some food for thought.
<strong>Chris, do 5.3 heads have closer valve centerlines?
Also doesnt smaller chamber encrouch valves hurting airflow? It seems like if you unshroud 5.3 heads to help flow youll end up with 5.7 chamber size. Whats the deal?</strong><hr></blockquote>
A 1.60 exaust valve would literally touch the outside of the cylinder head wall. But, the 5.3 heads are not merely a shrouded 5.7 head. The chamber shape is slightly different and more of a closed chamber design. When using the 5.3 heads, the outside of the chambers need opened up to the bore size for maximum flow. It will open up the chambers a little, but they still will be considerably smaller than the 5.7 heads and they will result in better airflow by unshrouding the valves. Rest assured that the 5.3 heads are the way to go.....but it's also more work.
Chris:
That's a killer combo. But, I'm wondering why you would need the larger 1.60 exaust valves vs. 1.57's AND a split pattern cam. A decent port job on the exaust side should flow around 230cfm. Considering the restriction of the intake manifold, I'm sure the e/i ratio would exceed 80% anyway with the 1.57 valves. It seems like to me that some of the intake charge could be pulled out through the exaust. Just some food for thought.