Anyone have a set or info on the heads? Im looking for a comparison to champions. I heard that the valve spacing was changed to get bigger valves on the 3.8 bore? Also heard that they flow 300cfm? Info on these heads have been nil since they came out sombody knows somthing.
TA heads????
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LikeMy6
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This is something alot of us would like to know, but seems evereyone is very tight lipped about them. Havent seen anyone make any claims even as to owning a set! I myself would like very much to purchase a set and was going to call TA this week for purchase info. Bad thing is tho (to my knowledge)if using rockers from the factory heads (stock or aftermarket) you have to purchase the pedestals seperate because the heads are a universal 14bolt design that use pedestals mounted over the 12 oclock bolt holes in the head so the factory rocker shaft can be mounted. So these pedestals cost about $160 and makes the price for a pair of 8 bolt heads using stock rockers reach about $1800 non ported, fully assembled and shipped.
- Joined
- May 26, 2001
- Messages
- 9,208
There are many differences between TA heads and Champion heads. There are 2 versions of TA heads, street and strip. The strip heads can use 2.02" intake valves and are CNC port-matched to Felpro intake and exhaust gaskets.
As far as flow numbers, unless you see the figures and know the source, most of these for ANY head is just what someone has "heard" or thinks.
I personally doubt, from our flow bench work, that an exsisting TA head could be made to flow 300 cfm? We have numbers on a few sets of TA and Champion heads and both sets can be made to flow impressive numbers. The only dyno numbers for TA heads I know of available were done by Ken D. and exceeded 1100 HP.
The TA heads are built for high boost application and are fortified in many areas to withstand abuse and not break. All finished casting are able to use 8 or 14 bolt patterns which is why a removable rocker "stand" is used. This steel backbone also adds strength and clamping force to the head.
There have been many sets shipped and even one customer had them for sale as he decided not to use them. Best way to obtain a set is to contact TA, or a distributor, and get on the priority list. Hopefully, in a few months, there will be sufficient shelf-stock and heads will be available for immediate shipment.
My set has been done and is to be installed on a TA alum block and running in about a month. Dyno runs are not planned but but lots of track time is!
As far as flow numbers, unless you see the figures and know the source, most of these for ANY head is just what someone has "heard" or thinks.
I personally doubt, from our flow bench work, that an exsisting TA head could be made to flow 300 cfm? We have numbers on a few sets of TA and Champion heads and both sets can be made to flow impressive numbers. The only dyno numbers for TA heads I know of available were done by Ken D. and exceeded 1100 HP.
The TA heads are built for high boost application and are fortified in many areas to withstand abuse and not break. All finished casting are able to use 8 or 14 bolt patterns which is why a removable rocker "stand" is used. This steel backbone also adds strength and clamping force to the head.
There have been many sets shipped and even one customer had them for sale as he decided not to use them. Best way to obtain a set is to contact TA, or a distributor, and get on the priority list. Hopefully, in a few months, there will be sufficient shelf-stock and heads will be available for immediate shipment.
My set has been done and is to be installed on a TA alum block and running in about a month. Dyno runs are not planned but but lots of track time is!
A
AsphaltAnihil8r
Guest
Nick ,last year I emailed you about getting on your list (Dennis King) So how is the list moving along,thanks been patient..Originally posted by Nick Micale
There are many differences between TA heads and Champion heads. There are 2 versions of TA heads, street and strip. The strip heads can use 2.02" intake valves and are CNC port-matched to Felpro intake and exhaust gaskets.
As far as flow numbers, unless you see the figures and know the source, most of these for ANY head is just what someone has "heard" or thinks.
I personally doubt, from our flow bench work, that an exsisting TA head could be made to flow 300 cfm? We have numbers on a few sets of TA and Champion heads and both sets can be made to flow impressive numbers. The only dyno numbers for TA heads I know of available were done by Ken D. and exceeded 1100 HP.
The TA heads are built for high boost application and are fortified in many areas to withstand abuse and not break. All finished casting are able to use 8 or 14 bolt patterns which is why a removable rocker "stand" is used. This steel backbone also adds strength and clamping force to the head.
There have been many sets shipped and even one customer had them for sale as he decided not to use them. Best way to obtain a set is to contact TA, or a distributor, and get on the priority list. Hopefully, in a few months, there will be sufficient shelf-stock and heads will be available for immediate shipment.
My set has been done and is to be installed on a TA alum block and running in about a month. Dyno runs are not planned but but lots of track time is!
- Joined
- May 26, 2001
- Messages
- 9,208
Valve spacing has changed as well as the spark plug is moved closer to the exhaust valve.
It does not appear that a 2.02" valve will clear in a 3.8" bore and we do not recommend it. The intake flow will be disturbed, and probably hurt more than help.
Flow numbers for 1.94" vs. 2.02" are very close. I elected to use 1.94" intake valves with a 3.90" bore. Flow numbers compared to worked Champion heads show slight increase on the intake side at higher lift range, and a better increase on exhaust at mid and high range lift.
We used Chevy valves with installed height of ~1.90" which allows a better spring selection, and lots of clearance to avoid coil bind.
TA is working on a VERY "cool" set of new design, high-tech looking valve covers for these heads [and will fit others!]. Main reason for them is clearance, especially in AC cars.
The production schedule has been delayed at the foundry making the raw castings. This is being worked out, and a large number of sets will soon be available. We will not initially stock these heads in the finished form, but will build-to-suit customer's orders.
