Hotcam kit rocker arms - LS1TECH - Camaro and Firebird Forum Discussion



LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Hotcam kit rocker arms

Reply
 
Thread Tools Search this Thread
Old 09-13-2017, 08:15 PM   #1
12 Second Club
Thread Starter
iTrader: (6)
 
Viper's Avatar
 
Join Date: Dec 2001
Location: Cleveland, OH
Posts: 4,816
Default Hotcam kit rocker arms

Bought a 97 TA with zero documentation besides the seller saying 'it has a hotcam and head work'. Are these the rockers that come with the hotcam kit?
Attached Thumbnails
Hotcam kit rocker arms-ra.jpg  
Viper is offline   Reply With Quote
Old 09-13-2017, 08:19 PM   #2
12 Second Club
Thread Starter
iTrader: (6)
 
Viper's Avatar
 
Join Date: Dec 2001
Location: Cleveland, OH
Posts: 4,816
Default

Also just noticed the casting # of 10125320 - isn't that the iron head?
Viper is offline   Reply With Quote
Old 09-13-2017, 08:47 PM   #3
TECH Junkie
 
Join Date: Apr 2008
Posts: 3,536
Default

those are GMPP RR that came with the Hot Cam kit. They are made by Crane

The pic "looks" like iron heads
BALLSS is offline   Reply With Quote
Old 09-13-2017, 09:00 PM   #4
Launching!
 
Join Date: Sep 2005
Posts: 203
Default

Those are the hot cam rockers like the others said quality stuff they have the bowtie's on them that's the give away. It looks like whoever redid his engine went the el cheapo route and used Impala heads instead of the aluminum LT1 heads.

The upside though is that they're iron heads and you have iron heads and an iron block if you want to boost the motor later down the line it's the perfect candidate.

I would be wondering how he ended up with Iron heads though on an LT1. Did he swap the motor out from an impala? Did the engine over heat and warp the original aluminum heads that badly? It's a mystery for sure. Just an odd find.
Heatmaker is offline   Reply With Quote
Old 09-13-2017, 09:09 PM   #5
12 Second Club
Thread Starter
iTrader: (6)
 
Viper's Avatar
 
Join Date: Dec 2001
Location: Cleveland, OH
Posts: 4,816
Default

Yep, 156K on the car so who knows. Runs strong, MoeHorsePower got me a great tune on it.

Last edited by Viper; 09-15-2017 at 08:51 AM.
Viper is offline   Reply With Quote
Old 09-14-2017, 09:36 AM   #6
Village Troll
iTrader: (2)
 
SS RRR's Avatar
 
Join Date: Oct 2002
Location: Jackstandican
Posts: 8,857
Default

Actually what it looks like is a thin layer of oil sludge baked onto an aluminum head.
Quote:
Originally Posted by Heatmaker View Post
The upside though is that they're iron heads and you have iron heads and an iron block if you want to boost the motor later down the line it's the perfect candidate.
Sweet Jesus...
SS RRR is offline   Reply With Quote
Old 09-14-2017, 09:40 AM   #7
12 Second Club
Thread Starter
iTrader: (6)
 
Viper's Avatar
 
Join Date: Dec 2001
Location: Cleveland, OH
Posts: 4,816
Default

"Actually what it looks like is a thin layer of oil sludge baked onto an aluminum head."

But I thought the casting # indicated iron head?
Viper is offline   Reply With Quote
Old 09-14-2017, 10:13 AM   #8
Village Troll
iTrader: (2)
 
SS RRR's Avatar
 
Join Date: Oct 2002
Location: Jackstandican
Posts: 8,857
Default

Yeah I posted before checking.
Even though allegedly/supposedly/reportedly the iron heads flow better than aluminum in stock form, in the long run you are far better off going with an aluminum head in every way imaginable.
SS RRR is offline   Reply With Quote
Old 09-14-2017, 05:15 PM   #9
Launching!
 
Join Date: Sep 2005
Posts: 203
Default

Quote:
Originally Posted by SS RRR View Post
Actually what it looks like is a thin layer of oil sludge baked onto an aluminum head.

Sweet Jesus...
What? The LT1 Iron heads have always been less problematic than aluminum but less popular because they're old tech iron. It's the aluminum headed LT1's that end up blowing gaskets and having heat problems. It's like a completely different world between F-body and Caprice/Impala guys. They run the same mods but never have the same issues. N/A, Supercharged or Boosted Iron heads make for pretty damn strong LT1. Def not going to be a disadvantage OP.
Heatmaker is offline   Reply With Quote
Old 09-14-2017, 05:38 PM   #10
Village Troll
iTrader: (2)
 
SS RRR's Avatar
 
Join Date: Oct 2002
Location: Jackstandican
Posts: 8,857
Default

LOL.. whatever you say. If that's the case then why in the wild world of sports did anyone ever even comprehend the idea of using aluminum heads?
SS RRR is offline   Reply With Quote
Old 09-15-2017, 07:42 AM   #11
TECH Addict
iTrader: (3)
 
Join Date: Feb 2003
Location: Texas
Posts: 2,164
Default

This is the answer I found:
Automakers turn to aluminum to cut weight out of cars, boost fuel economy.
Dont know if this is true for all auto makers or not..
moehorsepower is offline   Reply With Quote
Old 09-15-2017, 11:07 AM   #12
Village Troll
iTrader: (2)
 
SS RRR's Avatar
 
Join Date: Oct 2002
Location: Jackstandican
Posts: 8,857
Default

The weight savings is one, also an aluminum head dissipates heat quicker, which along with reverse cooling is the reason why the LT1 can run significantly higher CR which equates to better power efficiency. I have no idea what is meant by "less problematic." I haven't seen anything "problematic" using aluminum heads even with those using a serious power adder. If doing so, there are ways to keep the heads on the block and keep them sealed.
SS RRR is offline   Reply With Quote
Old 09-15-2017, 11:31 AM   #13
TECH Fanatic
iTrader: (1)
 
bowtienut's Avatar
 
Join Date: Mar 2007
Location: Bright, IN
Posts: 1,638
Default

Iron heads are more tolerant of maintenance/service abuse which could lead to massive overheating; that's why they were better suited to general B-body / police / taxicab use.
Aluminum relaxes and loses its properties at a lower temperature than cast iron does. I'm talking bulk overheating here, not just combustion chamber surface temperatures (which of course will be very high in serious performance applications).
Iron LT1 heads can and have made some serious power, but in a competent performance enthusiast's hands, no way are they better.

Viper, if you ever decide to run more cam ....stouter valvesprings, first make sure those heads have been upgraded to screw-in rocker studs. Stock are pressed-in.
bowtienut is offline   Reply With Quote
Old 09-15-2017, 09:30 PM   #14
12 Second Club
Thread Starter
iTrader: (6)
 
Viper's Avatar
 
Join Date: Dec 2001
Location: Cleveland, OH
Posts: 4,816
Default

Thanks appreciate the advice. Since summer is running out soon I plan to test the spring pressure come late fall/winter to see where I'm at.
Viper is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
will an LT4 hotcam kit work for a 98 silverado? UnZFeat'd LT1-LT4 Modifications 20 05-20-2017 08:58 PM
LT1 Cams and roller rockers My95Z Parts Classifieds 15 04-17-2017 05:47 PM
Hot cam kit, 243's LS6 intake Najania Parts Wanted 1 08-21-2016 01:38 PM
Cam question "cc305" 350 groundpounder LT1-LT4 Modifications 13 05-04-2016 05:55 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 05:34 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: