FI Heads?
02-27-2003 | 08:50 PM
#1
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FI Heads? I'm wondering if FI and N/A benefit from the same heads? I know a lot of local N/A guys love the GTP S2 heads. But I noticed a lot of guys in this forum have been going with TEA S2 heads. Post up the heads you choose and why? Are GTPs better for N/A and TEA better for FI or is it just a coincidence?
Thanks,
BH
Thanks,
BH
02-27-2003 | 11:47 PM
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Re: FI Heads? Well TEA offers 5.7L 73cc chambers, and 6.0L 73cc or 77cc chambers, I don't think other companies offer that, thats why I had to sell my MTI's great for all motor, but too much compression...
02-28-2003 | 07:45 PM
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Re: FI Heads? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JimmyKash:
<strong> DO A SEARCH
there was a long debated talk about this not too long ago...it was started by VINCE </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I did a search for heads and a search of any thread VINCE posted in and I didn't see any thread that was inquiring about different brand and style of heads and which was better for an FI application. Perhaps you could post up a link.
Otherwise, does anyone else have an opinion on this matter?
Mike
<strong> DO A SEARCH
there was a long debated talk about this not too long ago...it was started by VINCE </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I did a search for heads and a search of any thread VINCE posted in and I didn't see any thread that was inquiring about different brand and style of heads and which was better for an FI application. Perhaps you could post up a link.
Otherwise, does anyone else have an opinion on this matter?
Mike
03-02-2003 | 01:53 AM
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03-02-2003 | 04:00 AM
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Re: FI Heads? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JimmyKash:
<strong> https://ls1tech.com/ubb/ultimatebb.p...=001812#000013 </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks for the link. I actually saw that thread and perhaps there's a little confussion about my question. In that thread Vince was asking the generic question, are heads worth it on an FI application?
I'm not asking about the advantage or disadvantage of ported and polished heads, nor am I asking about a monetary worth.
I'm curious as to different aspects of the different brand of heads. TEA seems to be the head of choice in this section. GTP seems to be a local favorite around me. Is TEA a fav in here because it is the only company that produces a S2 6.0L head with 73cc and 77cc chambers? I don't know. Maybe there are other manufacturers that offer the same thing.
That's what I'm trying to figure out. I realize the advantages of S2 heads on our FI engines, I just want to know if there are any differences between manufacturers.
BH
<strong> https://ls1tech.com/ubb/ultimatebb.p...=001812#000013 </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks for the link. I actually saw that thread and perhaps there's a little confussion about my question. In that thread Vince was asking the generic question, are heads worth it on an FI application?
I'm not asking about the advantage or disadvantage of ported and polished heads, nor am I asking about a monetary worth.
I'm curious as to different aspects of the different brand of heads. TEA seems to be the head of choice in this section. GTP seems to be a local favorite around me. Is TEA a fav in here because it is the only company that produces a S2 6.0L head with 73cc and 77cc chambers? I don't know. Maybe there are other manufacturers that offer the same thing.
That's what I'm trying to figure out. I realize the advantages of S2 heads on our FI engines, I just want to know if there are any differences between manufacturers.
BH
03-02-2003 | 04:32 AM
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Re: FI Heads? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Blown Hawk:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JimmyKash:
<strong> https://ls1tech.com/ubb/ultimatebb.p...=001812#000013 </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks for the link. I actually saw that thread and perhaps there's a little confussion about my question. In that thread Vince was asking the generic question, are heads worth it on an FI application?
I'm not asking about the advantage or disadvantage of ported and polished heads, nor am I asking about a monetary worth.
I'm curious as to different aspects of the different brand of heads. TEA seems to be the head of choice in this section. GTP seems to be a local favorite around me. Is TEA a fav in here because it is the only company that produces a S2 6.0L head with 73cc and 77cc chambers? I don't know. Maybe there are other manufacturers that offer the same thing.
That's what I'm trying to figure out. I realize the advantages of S2 heads on our FI engines, I just want to know if there are any differences between manufacturers.
BH </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Some probably get the TEA heads for FI because of compression, but they have very good exhaust flow from what I have seen. I don't know how they were flowed( pipe or no pipe) but the TEA heads i have seen have very good exhaust flow, which all types of foreced incuction like.
Even though the cam specs for blower , nitrous, and especially turbo motors are different.... they all like good exhaust flow. Some porters will sacrifice intake flow if neccesary on a FI motor, to pick up exhaust flow,(which would give a better exhaust/intake ratio).
<small>[ March 02, 2003, 03:36 AM: Message edited by: Rpm2800 ]</small>
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JimmyKash:
<strong> https://ls1tech.com/ubb/ultimatebb.p...=001812#000013 </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks for the link. I actually saw that thread and perhaps there's a little confussion about my question. In that thread Vince was asking the generic question, are heads worth it on an FI application?
I'm not asking about the advantage or disadvantage of ported and polished heads, nor am I asking about a monetary worth.
I'm curious as to different aspects of the different brand of heads. TEA seems to be the head of choice in this section. GTP seems to be a local favorite around me. Is TEA a fav in here because it is the only company that produces a S2 6.0L head with 73cc and 77cc chambers? I don't know. Maybe there are other manufacturers that offer the same thing.
That's what I'm trying to figure out. I realize the advantages of S2 heads on our FI engines, I just want to know if there are any differences between manufacturers.
BH </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Some probably get the TEA heads for FI because of compression, but they have very good exhaust flow from what I have seen. I don't know how they were flowed( pipe or no pipe) but the TEA heads i have seen have very good exhaust flow, which all types of foreced incuction like.
Even though the cam specs for blower , nitrous, and especially turbo motors are different.... they all like good exhaust flow. Some porters will sacrifice intake flow if neccesary on a FI motor, to pick up exhaust flow,(which would give a better exhaust/intake ratio).
<small>[ March 02, 2003, 03:36 AM: Message edited by: Rpm2800 ]</small>
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03-03-2003 | 08:29 AM
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From: miami
Re: FI Heads? I got my LS6 Heads from GWP. I also got there custom grind cam. There cam and heads are optimized for FI. I get gobs of torque through out the power band.
RPM 2500 3000 3500 4000 4500
MMSRWHP 170.8 221.5 289.1 369.5 442.5
RWTQ 358.7 387.8 433.8 485.2 516.4
GWPRWHP 181.84 234.79 286.75 349.56 393.56
RWTQ 382.74 410.24 430.08 458.49 459.18
5000 5500 6000 6500
510.9 563.1 611.5 631.6
536.6 537.7 535.3 510.3
474.19 514.81 531.57 N/A
497.53 491.69 474.22 N/A
As you can see I build more torque and power upto about 3500 RPM's. After that MMS has me beat. I have been doing some research into this and I have concluded that it has to be in my tune. I have my car very conservativaly tuned. Living in Miami I have allot of extra heat and heat + FI= BOOM. So I have my timing sloping down hill starting at 3500 RPM's which is where I start seeing increased boost. If I tune more agressively Iam sure I can build just as much power as the MMS guys. But since I still have stock lower end I dont want to push it too hard and have a piston blow up or a rod break.
When I bought my head from GWP they had an overtosk on LS6 heads. So I got them for a really good price. Give Kenny at GWP a call. (303)346-5232. I think they only work with LS6 heads so they might still be able to get you a great deal.
Personally if you going to change out the heads you might as well do the cam. The heads alone will only give you an increase flow but if you dont have a cam the lifts higher to take advantage of the ported heads your not going to see the full potential of your heads.
RPM 2500 3000 3500 4000 4500
MMSRWHP 170.8 221.5 289.1 369.5 442.5
RWTQ 358.7 387.8 433.8 485.2 516.4
GWPRWHP 181.84 234.79 286.75 349.56 393.56
RWTQ 382.74 410.24 430.08 458.49 459.18
5000 5500 6000 6500
510.9 563.1 611.5 631.6
536.6 537.7 535.3 510.3
474.19 514.81 531.57 N/A
497.53 491.69 474.22 N/A
As you can see I build more torque and power upto about 3500 RPM's. After that MMS has me beat. I have been doing some research into this and I have concluded that it has to be in my tune. I have my car very conservativaly tuned. Living in Miami I have allot of extra heat and heat + FI= BOOM. So I have my timing sloping down hill starting at 3500 RPM's which is where I start seeing increased boost. If I tune more agressively Iam sure I can build just as much power as the MMS guys. But since I still have stock lower end I dont want to push it too hard and have a piston blow up or a rod break.
When I bought my head from GWP they had an overtosk on LS6 heads. So I got them for a really good price. Give Kenny at GWP a call. (303)346-5232. I think they only work with LS6 heads so they might still be able to get you a great deal.
Personally if you going to change out the heads you might as well do the cam. The heads alone will only give you an increase flow but if you dont have a cam the lifts higher to take advantage of the ported heads your not going to see the full potential of your heads.
03-03-2003 | 03:21 PM
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Re: FI Heads? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BLMONGOOSE:
<strong> Personally if you going to change out the heads you might as well do the cam. The heads alone will only give you an increase flow but if you dont have a cam the lifts higher to take advantage of the ported heads your not going to see the full potential of your heads. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Absolutely, I just didn't want to get in a whole cam spec debate at this point. I'm just trying to figure out which head manufacturer would be best suited for a blown car. Once I've got that then I fully plan to speak to their techs and go through specifically what I want and which heads/cam package is best suited to get me there.
BH
<strong> Personally if you going to change out the heads you might as well do the cam. The heads alone will only give you an increase flow but if you dont have a cam the lifts higher to take advantage of the ported heads your not going to see the full potential of your heads. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Absolutely, I just didn't want to get in a whole cam spec debate at this point. I'm just trying to figure out which head manufacturer would be best suited for a blown car. Once I've got that then I fully plan to speak to their techs and go through specifically what I want and which heads/cam package is best suited to get me there.
BH