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The Terminator
Terminator Talk
Are Longtubes bad for DOHC engines?
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<blockquote data-quote="stangfreak" data-source="post: 16429329" data-attributes="member: 10655"><p>you are just looking at hp numbers. That magical screen that people obsess over. The stock manifolds are good. On certain setups. Once you start going with a big blower, built motor, the long tubes will help. Long tubes dissipate heat much better than the stock manifolds. Now add more boost, everything gets hotter. Its a more efficient setup. And, you were around since late 02 into 03, jimmy vaccaro, the god father of mustangs we call used to call him, did long tubes on his ported eaton. He wasn't concerened on the HP numbers. BC he knew on the eaton, nothing would be gained. when he did the long tubes, the same month, he brought the car to the track. His car was on consistent car. On the dyno and the track. His car was perfect. with the long tubes installed, his car did MPH more. was it a fluke? I don't know. My other buddy johns cobra also MPH more when he installed long tubes but saw minimal hp gains. did the car become more efficient? again were they flukes? if your pumping out a lot of power, have a big build, have a big blower, IMO, long tubes are the way to go. I am not saying go isntall 1 7/8 long tubes. I have mac long tubes 1 5/8. and I did feel a difference in the car after we installed them. and without dropping names, a famous company actually copied macs design for fitment purposes.</p></blockquote><p></p>
[QUOTE="stangfreak, post: 16429329, member: 10655"] you are just looking at hp numbers. That magical screen that people obsess over. The stock manifolds are good. On certain setups. Once you start going with a big blower, built motor, the long tubes will help. Long tubes dissipate heat much better than the stock manifolds. Now add more boost, everything gets hotter. Its a more efficient setup. And, you were around since late 02 into 03, jimmy vaccaro, the god father of mustangs we call used to call him, did long tubes on his ported eaton. He wasn't concerened on the HP numbers. BC he knew on the eaton, nothing would be gained. when he did the long tubes, the same month, he brought the car to the track. His car was on consistent car. On the dyno and the track. His car was perfect. with the long tubes installed, his car did MPH more. was it a fluke? I don't know. My other buddy johns cobra also MPH more when he installed long tubes but saw minimal hp gains. did the car become more efficient? again were they flukes? if your pumping out a lot of power, have a big build, have a big blower, IMO, long tubes are the way to go. I am not saying go isntall 1 7/8 long tubes. I have mac long tubes 1 5/8. and I did feel a difference in the car after we installed them. and without dropping names, a famous company actually copied macs design for fitment purposes. [/QUOTE]
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Are Longtubes bad for DOHC engines?
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