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> LT1 Firebird Firehawk Hood "Inserts", Anyone ever done this?
KeithO
post Jun 3 2004, 05:15 PM
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There are two black inserts at the front of my Firehawk hood. I looked under the hood and saw that three plastic "bolts" and nuts hold this on. It appears that the piece that comes out is the black part and a part that is body color.

It appears that I remove this, the airflow could be improved across the front of the motor.

Has anyone removed this for tracking/road racing? Is there any reason that I wouldn't want to remove this? More underhood cooling = good. Especially with my car.
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94bird
post Jun 5 2004, 04:36 AM
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To give you an idea one of the durability tests we do at work is to run our engine for 625 hours from peak TQ rpm to peak HP rpm with 230 deg. coolant and 290-300 deg. F oil temp. We run Mobil 1 0W40 and have absolutely no problems. The same durability schedule is used for other engines that use 5W20 mineral oil. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/blink.gif) They all have to pass before they are allowed into production.

Now, I'm not going to tell you to take a mineral based oil above 280 deg. F for long periods of time, but it wouldn't stress me at all to see 280 deg. F oil temp for hours on end, like in an enduro. Add synthetic to the mix and it shouldn't break down until 320 deg. F or slightly above.

However, the cooler you can get the oil (at least above 220 deg. F though) and the coolant (near 200 deg. F is good) the better your engine will like you.
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KeithO   LT1 Firebird Firehawk Hood "Inserts"   Jun 3 2004, 05:15 PM
Chris 96 WS6   The only downside is much increased chance of rain...   Jun 3 2004, 06:26 PM
KeithO   It looks easy enough to add and removed that I may...   Jun 3 2004, 09:09 PM
94bird   Take a look at where the opening is. It's just...   Jun 3 2004, 09:22 PM
Chris 96 WS6   I thought we were talking Firehawk ram air hood. ...   Jun 3 2004, 09:26 PM
94bird   Ah but Chris, venting pressure from under the hood...   Jun 3 2004, 09:29 PM
KeithO   QUOTE (94bird @ Jun 3 2004, 03:22 PM)Take a l...   Jun 4 2004, 12:49 AM
94bird   I don't see how it would draw any air in. Ther...   Jun 4 2004, 02:28 AM
KeithO   AW crap! I meant to say Formula, not Firehawk...   Jun 4 2004, 09:45 AM
PF Flyer   ... does that hood have heat extractors or some wa...   Jun 4 2004, 11:02 AM
94bird   Mike, no a LT1 Formula hood has no real heat extra...   Jun 4 2004, 10:28 PM
KeithO   I guess this was a dumb idea... Even so, I may ru...   Jun 4 2004, 11:59 PM
94bird   Both of those temps are well within the good range...   Jun 5 2004, 12:56 AM
KeithO   QUOTE (94bird @ Jun 4 2004, 06:56 PM)Both of ...   Jun 5 2004, 01:17 AM
94bird   To give you an idea one of the durability tests we...   Jun 5 2004, 04:36 AM
steve-d   QUOTE (94bird @ Jun 4 2004, 10:36 PM)However,...   Jun 5 2004, 04:55 AM
94bird   No, just estimates. It seems like most engines I s...   Jun 5 2004, 05:02 AM
KeithO   Well then, I guess I can hammer away with confiden...   Jun 5 2004, 09:44 AM
KeithO   On two of three sessions, I completely buried the ...   Jun 6 2004, 09:38 AM
PF Flyer   morning Keith is the sender open to the exhaust o...   Jun 6 2004, 12:09 PM
Jon A   QUOTE (KeithO @ Jun 6 2004, 02:38 AM)I am ret...   Jun 6 2004, 07:00 PM
94bird   Keith, I'm with Jon. I'd put some thermal ...   Jun 6 2004, 07:53 PM
KeithO   Well, I buried the oil temp in all three sessions ...   Jun 6 2004, 11:42 PM
94bird   So, all this race talk and no comments about how y...   Jun 7 2004, 12:27 AM
KeithO   QUOTE (94bird @ Jun 6 2004, 06:27 PM)So, all ...   Jun 7 2004, 10:14 AM
Jon A   Tuesday my oil temps topped 300 once but usually s...   Jun 10 2004, 06:51 PM

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