Got the 1 7/8 Hooker Headers installed
Thread Starter
10 Second Fun Car
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Joined: Nov 2002
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From: Pearland, Tx
Got the 1 7/8 Hooker Headers installed Below is dyno overlay. Some items to be taken into account...
1.This was done in 95+ degree weather the other one during the winter time
2. Replaced the Macs (1 3/4) and y pipe with Random Tech cats with Hooker headers(1 7/8) and y pipe with Magnaflow cats.
3. The merge is a flow master piece.
4. After the car was picked up the converter would not lock up, so had it fixed. The lock up clutch and a bearing went out.
1.This was done in 95+ degree weather the other one during the winter time
2. Replaced the Macs (1 3/4) and y pipe with Random Tech cats with Hooker headers(1 7/8) and y pipe with Magnaflow cats.
3. The merge is a flow master piece.
4. After the car was picked up the converter would not lock up, so had it fixed. The lock up clutch and a bearing went out.
Wow, it's interesting to see the mac mids outperform
the hooker 1-7/8" headers up to 5200 rpm.
How did they compare from idle to 4000 rpm?
I wonder how much the temperatures affected the numbers.
the hooker 1-7/8" headers up to 5200 rpm.
How did they compare from idle to 4000 rpm?
I wonder how much the temperatures affected the numbers.
I doubt it, those RT cats are the best, maybe 1-2HP? Magnaflows are prolly about the same. I say they are a wash.
Thread Starter
10 Second Fun Car
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Joined: Nov 2002
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From: Pearland, Tx
Going to the track tonight hopefully, that will be the real test. I think it was worth the money. It allows for more cubic inches in the future and also got rid of the rasp of the Macs.
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So, the after upgrade to 1-7/8 headers dyno test was done in the +95 degree day?
If so, we can assume the HP/TQ gains from the larger headers would be more if the dyno test was also done in the winter.
I don't believe the lockup would change the results as it doesn't 't engage during WOT acceleration.
If so, we can assume the HP/TQ gains from the larger headers would be more if the dyno test was also done in the winter.
I don't believe the lockup would change the results as it doesn't 't engage during WOT acceleration.
Last edited by Paul Bell; Jun 24, 2011 at 12:43 PM.
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Most high flow cats really don't cost any HP, the reason why people don't get them is because of how costly they are. And since they don't add power most people just go ORY. And OP looks like a clean setup!
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Joined: Feb 2011
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From: Bentonville, AR
I see, thanks for clarifying. I didn't know how restrictive the cats were, or well weren't, haha.
Thread Starter
10 Second Fun Car
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Joined: Nov 2002
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From: Pearland, Tx
Went to the track tonight. Ran 12.15 @ 112, not too bad. I knew that my tires were marginal with the 2800vig now with a 3500 won't hold. Did cut a 1.78 but still slipped the tires. It was very hot and humid. Looks like a better set of tires is the next mod.
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From: Illinois
kinda interesting thread, but do you think the tires (and bad weather) really accounted for the loss in trap speed and 2 tenths on ur time? I was gonna go with TSP 1 7/8 but went cheap and went with pacesetters, so this is kind of interesting to me.
Thread Starter
10 Second Fun Car
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From: Pearland, Tx
The tires were slipping pretty bad. The time I posted in my sig is from a perfect weather night in 50 degree weather. My car has always been very tempermental with major weather changes. Last year at Super Chevy with the same weather and dead hooking I was running 12.2-12.4.
Thread Starter
10 Second Fun Car
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Joined: Nov 2002
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From: Pearland, Tx
