Post Your Dyno Numbers With A XE274
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From: Marietta ga
Post Your Dyno Numbers With A XE274
Please post your set up with a comp xe 274, or similar. I am running 350 with an xe 274 flat tappet, 10.3 : 1, double hump heads (ported), Air Gap RPM (port matched to heads), Demon 650 speed demon, and hooker side pipes with spiral baffels.
Dyno numbers or sheets Please
I am paying 900 bucks for the heads to be rebuilt, ported, and the manifold to be matched.... let me know what you think....
Dyno numbers or sheets Please
I am paying 900 bucks for the heads to be rebuilt, ported, and the manifold to be matched.... let me know what you think....
Melting Slicks
Joined: Jul 2000
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From: Peoria IL
If you haven't spent the money on the heads yet, don't. For 900 bucks you are in the range of some nice aftermarket aluminum heads. They will drop weight, flow better, and give you some detonation resistance.
I have a 350 with an XR269, RPM Air Gap, Vortecs, 1.6RRs, 9.4 CR, 750 demon, and hooker 1 3/4 with straight thru mufflers and an X-pipe. I don't have results to post yet though, but we've got a few interesting similarities.
I have a 350 with an XR269, RPM Air Gap, Vortecs, 1.6RRs, 9.4 CR, 750 demon, and hooker 1 3/4 with straight thru mufflers and an X-pipe. I don't have results to post yet though, but we've got a few interesting similarities.
One gear at a time
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CI 8-9-10 Veteran
St. Jude Donor '07-'08-'09
Originally Posted by korvetkeith
If you haven't spent the money on the heads yet, don't. For 900 bucks you are in the range of some nice aftermarket aluminum heads. They will drop weight, flow better, and give you some detonation resistance.
I spent a lot of time and $$$ on a set of 1959 #550 heads. My head porter ultimately go 232cfm out of the intakes at .550" and 193cfm exhaust, using a 1.88 Intake valve and 1.6 exhaust valve. The exhaust flow was 75-80% of intake at all lifts. He has no problem getting 260 cfm out of the camel hump heads. I'm considering letting him do a set of 461X heads for my '62. Wes
http://pic12.picturetrail.com/VOL432...1/63376070.jpg
http://pic12.picturetrail.com/VOL432...1/63376051.jpg
http://pic12.picturetrail.com/VOL432...1/63376473.jpg
Race Director
Joined: Aug 1999
Posts: 18,126
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From: WI
Dyno numbers DO NOT mean a thing!! the Dyno is a tool used to show a difference in a change you might make, it`s other use is to make sure your motor runs correctly and doesn`t leak!! Here is a short story for you.....I met a Ford guy that bought a 358" motor from Rusty Wallace (yes THAT Rusty Wallace) he watched it run on a dyno in Mooresville making 780hp, he then took it up to his guy in Appleton WI where it made 726hp SAME MOTOR/NO CHANGES!! do NOT trust "dyno numbers"......
...redvetracr
...redvetracr
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From: Marietta ga
Originally Posted by skid
Having run the XE274 with 1.6 rockers in a 9:1 engine with RPM heads, I can say I was fairly disappointed with the cam. Maybe if I had more compression, it would have worked better.
Possibly my compression is what makes my set up work so well..... so is the porting worth it
Drifting
Joined: Feb 2004
Posts: 1,277
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From: Santa Maria CA
not to change form HP ratings to cam choices but me and a buddy recently built a 357cid SBC for a 68' 4dr nova. it has stock vortec heads,hooker shorty headers with 2 1/2" and H-pipe into 3 chamber flows,air-gap intake,XE-262 cam,aluminum roller rockers,true d.roller timing chain, with a holley 600cfm carb up top.
with that combo the cam is snappy and very responsive. the compression is a basic 9.1 and lives happily on 89 octain with base timing at 10BTDC from the HEI. the motor makes great power off idle all the way to 5500 rpm and has a flat torque curve. its a great street car and helluva sleeper!
NEVER DYNO'd but doing computer simulation and factoring everything possible it showed 373HP@5250rpm and 410ft.tq@3800rpm. it sure feels like it!
with that combo the cam is snappy and very responsive. the compression is a basic 9.1 and lives happily on 89 octain with base timing at 10BTDC from the HEI. the motor makes great power off idle all the way to 5500 rpm and has a flat torque curve. its a great street car and helluva sleeper!
NEVER DYNO'd but doing computer simulation and factoring everything possible it showed 373HP@5250rpm and 410ft.tq@3800rpm. it sure feels like it!
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Burning Brakes
Joined: Feb 2003
Posts: 1,246
Likes: 1
From: SouthBend IN
head porting
I would say no to paying $900 to have a set of old style heads ported.( unless you run a class where rules say you have to use that head) Flow #'s aren't everything, you have to remember the old style heads don't have as effiencient combustion chambers as the newer style stuff.
I paid $1055 for my alum Canfields ( delivery included) from Competition products in Oshkosh , WI. Another good head is the Trick flows, which are a little less, both are alum and have really efficient combustion chambers too.
I use a comp nitrous cam. 218-230 @ .050, 9.8-1 rpm, 3310 ( elec choke) . mine made 292 RWHP and 421 TQ @ 2100. with a 150 shot it made 380 RWHP and 600RWTQ @ 3200. I ran 10.26@126 this year on a 200 shot, all through 3.07 gears. Point being is the heads just keep responding with the more nitrous i put to them.
Mike
I paid $1055 for my alum Canfields ( delivery included) from Competition products in Oshkosh , WI. Another good head is the Trick flows, which are a little less, both are alum and have really efficient combustion chambers too.
I use a comp nitrous cam. 218-230 @ .050, 9.8-1 rpm, 3310 ( elec choke) . mine made 292 RWHP and 421 TQ @ 2100. with a 150 shot it made 380 RWHP and 600RWTQ @ 3200. I ran 10.26@126 this year on a 200 shot, all through 3.07 gears. Point being is the heads just keep responding with the more nitrous i put to them.
Mike
Last edited by mike 1985; Jun 20, 2005 at 03:13 PM.
Drifting
Joined: Feb 2004
Posts: 1,277
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From: Santa Maria CA
Originally Posted by mike 1985
I would say no to paying $900 to have a set of old style heads ported.( unless you run a class where rules say you have to use that head) Flow #'s are everything, you have to remember the old style heads don't have as effiencient combustion chambers as the newer style stuff.
I paid $1055 for my alum Canfields ( delivery included) from Competition products in Oshkosh , WI. Another good head is the Trick flows, which are a little less, both are alum and have really efficient combustion chambers too.
I use a comp nitrous cam. 218-230 @ .050, 9.8-1 rpm, 3310 ( elec choke) . mine made 292 RWHP and 421 TQ @ 2100. with a 150 shot it made 380 RWHP and 600RWTQ @ 3200. I ran 10.26@126 this year on a 200 shot, all through 3.07 gears. Point being is the heads just keep responding with the more nitrous i put to them.
Mike
I paid $1055 for my alum Canfields ( delivery included) from Competition products in Oshkosh , WI. Another good head is the Trick flows, which are a little less, both are alum and have really efficient combustion chambers too.
I use a comp nitrous cam. 218-230 @ .050, 9.8-1 rpm, 3310 ( elec choke) . mine made 292 RWHP and 421 TQ @ 2100. with a 150 shot it made 380 RWHP and 600RWTQ @ 3200. I ran 10.26@126 this year on a 200 shot, all through 3.07 gears. Point being is the heads just keep responding with the more nitrous i put to them.
Mike
hey Mike, you like that torque boost the nitrous gives ya!?
BTW,aren't you abusing that D36 just a tad!?
Burning Brakes
Joined: Feb 2003
Posts: 1,246
Likes: 1
From: SouthBend IN
It's like a whole different car on spray.
The D-36 is still alive, we'll see what happens when the turbo 350 comes out and the 700r-4 goes back in though. I like the OD for hwy driving.
Mike
The D-36 is still alive, we'll see what happens when the turbo 350 comes out and the 700r-4 goes back in though. I like the OD for hwy driving.
Mike
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From: Marietta ga
My porter is telling me that Flow #'s aren't everything. He stresses velocity.... he says the cfm a head flows is only relative to a particular cam... he says more flow would hurt me with my cam (xe274). What cc are your intake and exhaust ports?? Also what kind of differential and tires are you running to get into the 10's. My diff feels slopy, like it is about to go, so it needs to be replaced. I want to put in something that will hold up to some sticky tires, but not break the bank. Also is that a roller cam you have?
Originally Posted by mike 1985
I would say no to paying $900 to have a set of old style heads ported.( unless you run a class where rules say you have to use that head) Flow #'s are everything, you have to remember the old style heads don't have as effiencient combustion chambers as the newer style stuff.
I paid $1055 for my alum Canfields ( delivery included) from Competition products in Oshkosh , WI. Another good head is the Trick flows, which are a little less, both are alum and have really efficient combustion chambers too.
I use a comp nitrous cam. 218-230 @ .050, 9.8-1 rpm, 3310 ( elec choke) . mine made 292 RWHP and 421 TQ @ 2100. with a 150 shot it made 380 RWHP and 600RWTQ @ 3200. I ran 10.26@126 this year on a 200 shot, all through 3.07 gears. Point being is the heads just keep responding with the more nitrous i put to them.
Mike
I paid $1055 for my alum Canfields ( delivery included) from Competition products in Oshkosh , WI. Another good head is the Trick flows, which are a little less, both are alum and have really efficient combustion chambers too.
I use a comp nitrous cam. 218-230 @ .050, 9.8-1 rpm, 3310 ( elec choke) . mine made 292 RWHP and 421 TQ @ 2100. with a 150 shot it made 380 RWHP and 600RWTQ @ 3200. I ran 10.26@126 this year on a 200 shot, all through 3.07 gears. Point being is the heads just keep responding with the more nitrous i put to them.
Mike
Burning Brakes
Joined: Feb 2003
Posts: 1,246
Likes: 1
From: SouthBend IN
I had a typo in the first post, I corrected it.
he's right flow #'s aren't everything. Port design, swirl, and combustion chamber shape are probably more important. With a 350 cid you'll want to stay under 200 cc intake ports, mine are 195's. My cam is not a roller, it's just a hyd flat tappet. I have the stock Dana 36 rear end that came in my 85. ( I switched the car over to a carb set up). I run a 26X11.5X16 MT ET STREET at the track and just regular tires for everyday driving.
I really like the voodoo 268 cam myself. If your going to stay NA it's perfect, if you plan spray or a blower I would just have it ground on a 112 LSA.
Plus my car weighs 3000lbs with driver at the track. That helps it run fast and save parts.
Mike
he's right flow #'s aren't everything. Port design, swirl, and combustion chamber shape are probably more important. With a 350 cid you'll want to stay under 200 cc intake ports, mine are 195's. My cam is not a roller, it's just a hyd flat tappet. I have the stock Dana 36 rear end that came in my 85. ( I switched the car over to a carb set up). I run a 26X11.5X16 MT ET STREET at the track and just regular tires for everyday driving.
I really like the voodoo 268 cam myself. If your going to stay NA it's perfect, if you plan spray or a blower I would just have it ground on a 112 LSA.
Plus my car weighs 3000lbs with driver at the track. That helps it run fast and save parts.
Mike
Last edited by mike 1985; Jun 20, 2005 at 03:22 PM.
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From: Marietta ga
My ex274 is on a 110 lsa, what difference would the 112 make for everyday driving and spray/blower set ups?.... I am running 10.5:1 if that makes a diffence.... It might even be higher than that because my pistons are pretty much out of the bore.
Originally Posted by mike 1985
I had a typo in the first post, I corrected it.
he's right flow #'s aren't everything. Port design, swirl, and combustion chamber shape are probably more important. With a 350 cid you'll want to stay under 200 cc intake ports, mine are 195's. My cam is not a roller, it's just a hyd flat tappet. I have the stock Dana 36 rear end that came in my 85. ( I switched the car over to a carb set up). I run a 26X11.5X16 MT ET STREET at the track and just regular tires for everyday driving.
I really like the voodoo 268 cam myself. If your going to stay NA it's perfect, if you plan spray or a blower I would just have it ground on a 112 LSA.
Plus my car weighs 3000lbs with driver at the track. That helps it run fast and save parts.
Mike
he's right flow #'s aren't everything. Port design, swirl, and combustion chamber shape are probably more important. With a 350 cid you'll want to stay under 200 cc intake ports, mine are 195's. My cam is not a roller, it's just a hyd flat tappet. I have the stock Dana 36 rear end that came in my 85. ( I switched the car over to a carb set up). I run a 26X11.5X16 MT ET STREET at the track and just regular tires for everyday driving.
I really like the voodoo 268 cam myself. If your going to stay NA it's perfect, if you plan spray or a blower I would just have it ground on a 112 LSA.
Plus my car weighs 3000lbs with driver at the track. That helps it run fast and save parts.
Mike
Burning Brakes
Joined: Feb 2003
Posts: 1,246
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From: SouthBend IN
If the same cam has a 112 LSA it will have less overlap,make more vaccume and less of the intake charge going out the exhaust. This works wqell with a power adder, but for a NA combo the 110 is better because it helps pull more intake charge in.
Sounds to me like a nice combo, the 10.5-1 will work well with the XE 274 cam, just spend your money on a good head.
Mike
Sounds to me like a nice combo, the 10.5-1 will work well with the XE 274 cam, just spend your money on a good head.
Mike
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From: Marietta ga
I would be interested in a 100 or 150 shot down the road. I have ran this cam before with stock heads and I am pretty sure I will keep it for the time being. If I do change the cam, it will be a roller set up... but that is down the road.
I understand that the 112 will better under spray, but will I have problems running a 110. Also my Keith Black pistons are not forged, do you think they can handle a 150 shot?
I understand that the 112 will better under spray, but will I have problems running a 110. Also my Keith Black pistons are not forged, do you think they can handle a 150 shot?
Melting Slicks
Joined: Jul 2000
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From: Peoria IL
150 is as much as you'll want to run on cast pistons, and not have to worry. You'll want to retard the timing some. The diff between a 110 and 112 would be negligable. But due to your high compression and iron heads I would go with the 110 to ease the cylinder pressure.
Melting Slicks
Joined: Jul 2000
Posts: 2,112
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From: Peoria IL