Crusher
09-02-2013, 10:01 PM
#322
The ITBs (or IAT) were heat soaking pretty bad so Emilio made this up in about 5 minutes. It's a basic heat shield to keep some of the radiator and engine heat off the plenum dome. The Coroplast will self clearance under the hood, is light and is easy to work with.
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09-02-2013, 10:58 PM
#323
Emilio is in the middle of final prep and loading but I watched the creation being cut:
The ITBs (or IAT) were heat soaking pretty bad so Emilio made this up in about 5 minutes. It's a basic heat shield to keep some of the radiator and engine heat off the plenum dome. The Coroplast will self clearance under the hood, is light and is easy to work with.
The ITBs (or IAT) were heat soaking pretty bad so Emilio made this up in about 5 minutes. It's a basic heat shield to keep some of the radiator and engine heat off the plenum dome. The Coroplast will self clearance under the hood, is light and is easy to work with.
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09-03-2013, 01:44 AM
#324
Late night tuning session at Advanced Engine Dynamix in Orange.
Same bottom end and ITB's as before. Swapped SuperMiata CNC BP6D head with .395 cam for SuperMiata CNC BP4W head with .427 cam. Made 5-15 more whp pretty much everywhere. Played with intake cam gear a bit. Getting a little spark scatter so we're going to put a stock valve cover back on. The cut up one lets the CAS shake around like mad. Running the stock 4T because we ran out of time. Really needs a 12+1T so we can ditch the CAS altogether.
So yeah, 190whp on 10.4:1 and 1861cc. Pretty happy with that. 85.5's and 12.0:1 with better ignition precision would get that over 200whp. Maybe after nationals.
Same bottom end and ITB's as before. Swapped SuperMiata CNC BP6D head with .395 cam for SuperMiata CNC BP4W head with .427 cam. Made 5-15 more whp pretty much everywhere. Played with intake cam gear a bit. Getting a little spark scatter so we're going to put a stock valve cover back on. The cut up one lets the CAS shake around like mad. Running the stock 4T because we ran out of time. Really needs a 12+1T so we can ditch the CAS altogether.
So yeah, 190whp on 10.4:1 and 1861cc. Pretty happy with that. 85.5's and 12.0:1 with better ignition precision would get that over 200whp. Maybe after nationals.
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09-03-2013, 08:55 AM
#327
Boost Czar
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Square top vs ITB's: Note how the numeric hp gained up top is slightly less than the losses down low with the ITB's. This is to be expected for ITB's vs a single throttle manifiold (STB). Overall though, the power area is greater with the ITB's, just shifted up about 500rpm.
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, I have "some" dyno work to do... 
09-03-2013, 11:03 AM
#332
Runner length has been rough tuned. It's within about 15mm of optimum now.
When we come back from nationals we'll play with that a bit more.
Cam specs:
Current 190whp plot
BP4W - Integral
In 274° seat, .427 cam lift .014 lash (hot)
Ex 266° seat, .410 cam lift .014 lash (hot)
Previous 183whp plot
BP6D - Integral
In 266° seat, .395 cam lift .014 lash (hot)
Ex 263° seat, .385 cam lift .014 lash (hot)
When we come back from nationals we'll play with that a bit more.
Cam specs:
Current 190whp plot
BP4W - Integral
In 274° seat, .427 cam lift .014 lash (hot)
Ex 266° seat, .410 cam lift .014 lash (hot)
Previous 183whp plot
BP6D - Integral
In 266° seat, .395 cam lift .014 lash (hot)
Ex 263° seat, .385 cam lift .014 lash (hot)
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09-03-2013, 10:30 PM
#340
Being an NB2, we don't need to. Zero point short block frees up a few valuable points for 225's and a splitter.
As the years go by I have learned to generate more power and grip with fewer and simpler mods. This knowledge enables us to use a few precious points elsewhere. Jeff Prestons 2012 TTE winning car is a brilliant example of that. 185's freed up points for aero. Small tires only last 2 laps before going off but its a TT.
The key in building a PT/TT is to not assume you "need" any particular mod to win. Review alternative setups to gain speed. That and not leaving anything on the table in free mods.
As the years go by I have learned to generate more power and grip with fewer and simpler mods. This knowledge enables us to use a few precious points elsewhere. Jeff Prestons 2012 TTE winning car is a brilliant example of that. 185's freed up points for aero. Small tires only last 2 laps before going off but its a TT.
The key in building a PT/TT is to not assume you "need" any particular mod to win. Review alternative setups to gain speed. That and not leaving anything on the table in free mods.
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