Teach me about ITR 325's

[Gary L]

Anybody have any idea how many cars have different hp ratings on the same spec line?

I tried to think of others besides the ITA Miata and RX7, and can think of only one. Mine -- 133 for the carb car, 137 for FI.

Just trying to understand how big of a universe we are dealing with.

I would think the ITB Volvo 140 series might be the poster child for this situation. Six model years are covered on one line entry. All six have the same basic engine, but the listing encompasses three factory engine designators (B20B, B20E, B20F), two different dual carb setups, two different Bosch injection systems, two short blocks and two heads. There is approximately 15% horsepower differential across the bunch.

The chassis for all six model years are essentially the same, but everyone that builds one of these simply uses the '71 B20E engine long block assembly and matching Bosch D-Jet injection. That particular engine is singularly the most powerful of the bunch, before and after IT tweaks. Bottom line - everyone ends up with what is essentially a '71 142E.

[JeffYoung]

Gary, since you have a lot of experience wtih this, in your opinion, is that a good or a bad thing, to have six different model years with varying induction systems and power outputs on the same line?

Or would the lower power cars be better served on a different line in C?

The flip side is that having the option to build any 140 into an ITB 140E opens up the number of actual chassises available to you, correct?

Interested in your thoughts, because I agree, that car looks like the poster child for this "issue" (if it is one).

I would think the ITB Volvo 140 series might be the poster child for this situation. Six model years are covered on one line entry. All six have the same basic engine, but the listing encompasses three factory engine designators (B20B, B20E, B20F), two different dual carb setups, two different Bosch injection systems, two short blocks and two heads. There is approximately 15% horsepower differential across the bunch.

The chassis for all six model years are essentially the same, but everyone that builds one of these simply uses the '71 B20E engine long block assembly and matching Bosch D-Jet injection. That particular engine is singularly the most powerful of the bunch, before and after IT tweaks. Bottom line - everyone ends up with what is essentially a '71 142E.