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  #71  
Old 10-31-2013, 05:13 PM
TRBenj TRBenj is offline
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If the boats with engines that have the alleged higher "real" hp were proving to be quicker and faster than the boats with "overrated" powerplants, I could maybe buy that. But its simply not the case. Comparable hulls with comparable engines from comparable marinizers (SN 200 with PCM409 vs. 197 with Ilmore 6.0L, for example) run nearly identical top end speeds (47-48mph).

Youre buying into a numbers game because you want it to be true. The proof is in the pudding!
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  #72  
Old 10-31-2013, 06:01 PM
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scott023 scott023 is offline
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Quote:
Originally Posted by TRBenj View Post
If the boats with engines that have the alleged higher "real" hp were proving to be quicker and faster than the boats with "overrated" powerplants, I could maybe buy that. But its simply not the case. Comparable hulls with comparable engines from comparable marinizers (SN 200 with PCM409 vs. 197 with Ilmore 6.0L, for example) run nearly identical top end speeds (47-48mph).

Youre buying into a numbers game because you want it to be true. The proof is in the pudding!


There's no better way to state it then that.
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  #73  
Old 10-31-2013, 08:31 PM
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Rossterman Rossterman is offline
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Earlier post on LTR vs. base TBI where they dyno'd each showed that the HP difference was really ~ 12-15 Hp not the 40HP advertised. If you think about it, Manufacturers have fudged the numbers up and down for years as a sales/marketing gimmick.

2001 camaro LS1 was rated at 325hp but routinely put more that down to the back wheels. Down rated primarily as the same engine was used in the corvette and couldn't have too close of a rating for marketing purposes.

If you think about it, the engines are really mechanically identical on the internals (cam, heads, comp ratio, etc.) so intake and exhaust and what makes the difference. TBI intake was pretty well designed and comparable most of the way up the RPM range compared to the LTR which breathed slightly better on top due to open plenum manifold. This was worth a few HP on top but how many would they sell if they indicated that the difference was only ~ 10hp?
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  #74  
Old 10-31-2013, 08:47 PM
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JimN JimN is offline
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Quote:
Originally Posted by Rossterman View Post
Earlier post on LTR vs. base TBI where they dyno'd each showed that the HP difference was really ~ 12-15 Hp not the 40HP advertised. If you think about it, Manufacturers have fudged the numbers up and down for years as a sales/marketing gimmick.

2001 camaro LS1 was rated at 325hp but routinely put more that down to the back wheels. Down rated primarily as the same engine was used in the corvette and couldn't have too close of a rating for marketing purposes.

If you think about it, the engines are really mechanically identical on the internals (cam, heads, comp ratio, etc.) so intake and exhaust and what makes the difference. TBI intake was pretty well designed and comparable most of the way up the RPM range compared to the LTR which breathed slightly better on top due to open plenum manifold. This was worth a few HP on top but how many would they sell if they indicated that the difference was only ~ 10hp?
Most of the difference between TBI and multi-port injection has to do with the turbulence caused by that big goiter of injectors in the way of the air that's trying to get in. When a throttle body has no obstructions, getting more HP is a piece of cake. Tasty, tasty cake.
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