C4 Serpentine Setup
Racer
Joined: Mar 2004
Posts: 292
Likes: 2
From: Plumas Lake CA
I'm going to do the same mod to my '70 convertible. I'd like to run most of the C4 A/C system (my car has most of the factory air parts still in it but I'd like to modernize it), 89 accessory drive, Jeep steering box, hydroboost, and an electric fan. I don't know if the old iron vette heads have all the correct holes to bolt the brackets to. You could always drill them if you're careful with the heads. I'm already using L98 heads so I wasn't too concerned with that problem.
Wish I had more info for you. I'm going to subscribe to this thread though!
Wish I had more info for you. I'm going to subscribe to this thread though!
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by 1mpalss
I'm going to do the same mod to my '70 convertible. I'd like to run most of the C4 A/C system (my car has most of the factory air parts still in it but I'd like to modernize it), 89 accessory drive, Jeep steering box, hydroboost, and an electric fan. I don't know if the old iron vette heads have all the correct holes to bolt the brackets to. You could always drill them if you're careful with the heads. I'm already using L98 heads so I wasn't too concerned with that problem. Wish I had more info for you. I'm going to subscribe to this thread though!
Wish I had more info for you. I'm going to subscribe to this thread though!I'm fairly certain that the stock heads all had the same three bolt pattern all the way up through the LT1s. If nothing else, they stopped AT the LT1s.
Thread Starter
Drifting
Joined: Jul 2005
Posts: 1,562
Likes: 2
From: Spring Texas
Originally Posted by 1mpalss
I'm already using L98 heads so I wasn't too concerned with that problem. Wish I had more info for you. I'm going to subscribe to this thread though!
Wish I had more info for you. I'm going to subscribe to this thread though!
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by 71rdster
I have been looking for some L98 heads, for the weight savings alone. The bolt holes should be the same. For now, I will just have to stick with the iron heads.
How much weight are you looking to lose? Got a goal front and back?
Thread Starter
Drifting
Joined: Jul 2005
Posts: 1,562
Likes: 2
From: Spring Texas
Spare tire is not mounted. L98 heads would reduce front end weight by close to the same amount (40 lbs). It won't be raced. If it was, I would probably go for some more performance rated heads either from GMPP Dart, or AFR.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by 71rdster
Spare tire is not mounted. L98 heads would reduce front end weight by close to the same amount (40 lbs). It won't be raced. If it was, I would probably go for some more performance rated heads either from GMPP Dart, or AFR.
For the same price as the heads you could get a set of L88 buckets and lexan light covers. Both fron stock light setups probably weight that much at least.
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Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
Originally Posted by Durango_boy
The LS serp seems very different. He seems to be asking about serp pre-LT1.
I've done the C-4 set up when I had a TPI system. It worked perfect. Never lost a belt.
I guess the forum turns off the "my corvette photos" during peak usage.
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
Originally Posted by Durango_boy
As far as the Vette goes, how many serp systems have come stock? Exclude the LT5, and C6.
92-96 LT1 (and LT4) are all the same as far as I know and will not fit the pre-LT1 engines (no water pump, etc.). ZR1 is by itself.
C5-6: 97 up LS engines I am not familiar with, but assume they are probably the same for C5 years. Different than C6? Don't know.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by markdtn
C4: 84-91 are similar but 84-85 have 1 alternator while 86-91 have another. 84-87? use an R4 a/c compressor, while 88?-91 use a Nippendenso. Main left mount is same 84-91. Right main mount changes with the a/c compressor. p/s pump and water pump is the same all years. air pump mounts are different for the different alternators-buy air pump eliminators based on which style alternator you plan to use. These fit nicely in a C3.
92-96 LT1 (and LT4) are all the same as far as I know and will not fit the pre-LT1 engines (no water pump, etc.). ZR1 is by itself.
C5-6: 97 up LS engines I am not familiar with, but assume they are probably the same for C5 years. Different than C6? Don't know.
92-96 LT1 (and LT4) are all the same as far as I know and will not fit the pre-LT1 engines (no water pump, etc.). ZR1 is by itself.
C5-6: 97 up LS engines I am not familiar with, but assume they are probably the same for C5 years. Different than C6? Don't know.
Good job. That's a terrific way to summarize it all.
Racer
Joined: Jun 2005
Posts: 400
Likes: 11
From: Lubbock Texas
Has anyone used the setup off a early -mid 90's pickup?
I have a 95' chevy p/u & the serp system looks real compact & looks like it will bolt right in with no problems. Plus the truck systems should be very pleantiful at the wrecking yards.
I have a 95' chevy p/u & the serp system looks real compact & looks like it will bolt right in with no problems. Plus the truck systems should be very pleantiful at the wrecking yards.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by Rdavis
Has anyone used the setup off a early -mid 90's pickup?
I have a 95' chevy p/u & the serp system looks real compact & looks like it will bolt right in with no problems. Plus the truck systems should be very pleantiful at the wrecking yards.
I have a 95' chevy p/u & the serp system looks real compact & looks like it will bolt right in with no problems. Plus the truck systems should be very pleantiful at the wrecking yards.
By bud has a '91 with serp, and I don't think it was stock, but it's just like the one that I got off a '92 Camaro. Could be the same brackets as a Camaro...between it and the truck.
Racer
Joined: Jun 2005
Posts: 400
Likes: 11
From: Lubbock Texas
Durango
Heres a couple of pics of the truck system:
To me it actually looks more compact than the car systems Also looks like it is not as tall. I measured from the lip of the valvecover on the intake side & both the alt & ac compressor are only 6" above the bottom of the valve cover. also note the position of the tensioner where it bolts to the ac bracket vs the center of the engine, looks to me that the setup is somewhat narrower than the system that you are instaling. Also the idler below the compresser is smaller.
I run elec fans so I don't have to worry about fan clearance.
What do you think?
Heres a couple of pics of the truck system:
To me it actually looks more compact than the car systems Also looks like it is not as tall. I measured from the lip of the valvecover on the intake side & both the alt & ac compressor are only 6" above the bottom of the valve cover. also note the position of the tensioner where it bolts to the ac bracket vs the center of the engine, looks to me that the setup is somewhat narrower than the system that you are instaling. Also the idler below the compresser is smaller.
I run elec fans so I don't have to worry about fan clearance.
What do you think?
Racer
Joined: Jun 2005
Posts: 400
Likes: 11
From: Lubbock Texas
Couple of ??
The problems that I am forseeing here is:
1. what is that extra connection on the back of the ac compressor (green & tan wire), as my vette only has the wiring to the ac clutch.
2. I am assuming that the p/s pressure hose is going to have a dang metric fitting. I asume that there is an adapter made to go from the metric on the back of the pump - the standard vette p/s pressure line. OR is my vette pump able to be substitutted for the pickup pump.
3. Alternater wiring conversion, Think that I have that covered from madelectric,as they make a pigtail to adapt the old style - the new style. What series is the alt on the truck?
4. The origional compresser on my vette is the long style so I'm sure that the hi/lo pressure lines are going to be diffrent. Maybe ones for a later model vette would work?
5. The compressor on the truck seems to be of the type that "cycles". I don't like that as it will make for an unstable idle on a carbed car since there is no computer to keepe the idle speed constant. any fix for that?
Other than that looks like a bolt in swap.
The problems that I am forseeing here is:
1. what is that extra connection on the back of the ac compressor (green & tan wire), as my vette only has the wiring to the ac clutch.
2. I am assuming that the p/s pressure hose is going to have a dang metric fitting. I asume that there is an adapter made to go from the metric on the back of the pump - the standard vette p/s pressure line. OR is my vette pump able to be substitutted for the pickup pump.
3. Alternater wiring conversion, Think that I have that covered from madelectric,as they make a pigtail to adapt the old style - the new style. What series is the alt on the truck?
4. The origional compresser on my vette is the long style so I'm sure that the hi/lo pressure lines are going to be diffrent. Maybe ones for a later model vette would work?
5. The compressor on the truck seems to be of the type that "cycles". I don't like that as it will make for an unstable idle on a carbed car since there is no computer to keepe the idle speed constant. any fix for that?
Other than that looks like a bolt in swap.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by Rdavis
2. I am assuming that the p/s pressure hose is going to have a dang metric fitting. I asume that there is an adapter made to go from the metric on the back of the pump - the standard vette p/s pressure line. OR is my vette pump able to be substitutted for the pickup pump.
Originally Posted by Rdavis
3. Alternater wiring conversion, Think that I have that covered from madelectric,as they make a pigtail to adapt the old style - the new style. What series is the alt on the truck?