Any one using these heads on their car? Can any one recommend a cam I have factory 3.27 gears hoping to change to 3.70 with 3000 stall on my 700R4.

Leo,

Those trick flows are a nice head. If you wanted to use a bigger cam I would suggest getting the appropriate spring that would match it. I like my tf s. Depends on what you want to do with your car. I would recommend doing a search you'll find lots of info on this head as well.

Rabi C.

how much of a bigger cam can you go with different springs?

Pete,

Its all relative my dear watson. Its all relative.

When you order the cam just ask them to match you up with the appropriate spring. That takes out the guess work.

Rabi C.

I have Trickflow TW heads & have a Cam w/a .520 lift. Yes, I had to change to heavier springs from the standard TF springs to heavier ones when I bumped from .480 to .520 cam. I got my springs from TPIS where I bought the cam. Trickflow offers heavier springs also, but I just figured get both from one supplier at one time. Another thing, make sure you check for diameter of the springs that need replacing before you buy so you don't end up w/a delay. Good luck on your project!

Do these heads take a special rocker arm? If they are the ones I'm thinking about there have been good reports about them.

I was told by TFS to use Crane Gold race Extruded Rocker arm Kit Part no. 11750-16. only problem now is I think the shop may have lost the Guide plates and their are no longer available.

You can always use the Isky adjustable guide plates if that is the case.
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I would use the highest lift roller cam your heads/springs will take. I would say something in the 218-224 degree duration range for good street performance.

The Trick Flow heads are awesome. They're second to only the AFR heads for a lot less money.
Quite a few of us in SoCal have those heads and you can see how many 12 second cars we have.

i heard you cannot use a cam tha
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i heard you cannot use a cam that has a lift greater than 500 unless you buy special trickflow pistons or fly-cut your own so just using heavier springs will work?

this is a quote from another board when I was looking up info on the heads on Google from Artie he works for TFS
"As far as piston to valve clearance goes, The rule of thumb for using a TW head (either G1 or G2) on a stock type piston with no valve relief modifications is as follows:

So long as you stay at or below 236* @ .050" Duration, No less than a 108* LSA, you can go up to about .520" lift before piston to valve clearance becomes an issue.

Of course, using narrower or wider LSA will affect PtoV, as well as the ICL, as well as the duration. Just keep in mind this "Rule of thumb" spec is merely a starting point...

Remember, with the valvesprings only being good for up to .500" lift, to go with more lift will require you to change out the springs to whatever the camshaft manufacturer recommends for whatever camshaft you choose...."

thanks leo that explains it

I think that is for the Twisted Wedge heads, not the regular ones.

Yes, Its for the Twisted Wedge first gen heads I'm knot sure if there are any different for the 2nd gen.

The first gen design is the only version that needs custom pistons. They stopped implementing the canted valve because of complaints that they where not truly "bolt on". The second gen and on are designed like the traditional chevy head in terms of valve placement. Here is a link to a pic of the valves;

http://store.summitracing.com/largei...30300005_w.jpg

Rabi C.

I think there should be some clarification on terms used refering to "1st Generation and Second Generation". First, there are two generations of theTwisted Wedge design. The first was a 180cc intake with a 64cc intake commonly refered to as the G1. My source is Artie Kakiou, TFS Tech Advisor. This head is actually a pretty darn good head for being an older design.

NOTE THAT THERE IS SPECIAL SET-UP INVOLVED WITH THE G1 DESIGN!!

Read this link carefully. You will need special rocker arms for the intake and ...if you need to replace valves, you will need special valves for the intake. If you don't get the special rocker arms, you will wear the intake guides in no time flat!!! I know! I've done it!! Even after you get your special rockers, get an adjustable pushrod for checking geometry and do it! Better safe than sorry.

http://www.chevelles.com/forums/showthread.php?t=17310

The G2 design is a 200cc intake with a 64cc and maybe even a 72cc chamber. Don't quote me on the 72cc but I think I have seen them. These do not require special set up (read the link). For some reason, it's been a case of bigger is not necessarily bigger because the G2's have proven to not be any better than the G1's...in fact some guys won't run 'em over the G1's.

Then there is the Trickflows with the standard 23 degree angles...no Twisted Wedge...and inferior to the G1's in my humble opinion. Certainly not in the arena with AFR's.

I'm running the G1's in my '66 Camino. I like them. Second set I've owned. If you can find it, Chevy Highperformance Magazine had an off shoot with just Camaro Tech. There's a 3rd Gen with a SteathRam and G1's that ran real hard. Great tech article.

Interestingly enough, the intake valve angle is the same as SB2. Think that's just coincendance?

just a quick stupid question..i was under the influence that my 89 came stock with a "1rst" generation block..correct me if im wrong.

yes gen 1.

LT based motors gen 2
LS based motors gen 3 and i think also gen 4.

More confusion. G1 and G2 Trickflow Twisted Wedge Heads are both for Gen 1 Smallblock Chevrolets. The two generations of Twisted Wedges are generations of the Twisted Wedge design.... and have nothing to do with what Generation of Chevy Smallblock they were made for. Is that clear as mud?

it is a gen1 however its different then a gen1 u would find in previous years.. pre 1985.. they changed some of the internals and such and went to reverse flow water rotation, im 99% sure this is when they switched to roller cams.. which is typicaly how people classify an LT1 but i have a genuine L98 not LT1 with reverse flow

Hi have the Trick Flow Twisted Wedge with the Crane Gold 1.6 Roller rocker and the stock length push rod. I did got the spring replace because the broke.. this was my fault, when I put longer push rods and strained the springs (this was about 6 years ago). I have teh GM ZZ3 Short Block (208, 221, 112). I also have flat piston. My ompression ratio is about ~10:1

Isince orderd the heads for GM center bolt set up, I had to modify the valce covers... nothing mayor.. one thing though, is not to over thigthen the valve covers (center bolt)

So far the heards are sweet... if you could get the ported before putttin then, even better!

We're talking different generations of the Trick Flow heads here, people. Not different generations of the small block Chevy engine. Try to keep up.

I run the G-1 Twisted Wedge heads on my 355 currently and am now in the process of getting a 400 together with a Trick Flow hydraulic roller cam shaft and I will putting these heads on that motor along with the Comp Cams Beehive valve springs that are good to .600" lift. I will also be running the Comp Pro Magnum 1.6 roller rockers that have the special ones for the intake valves. According to one of the tech guys I talked to at the Hot Rod Power Tour, he says I'm going to love the way the new motor runs. My 355 runs and pulls strong through 6500 rpms which is a blast to run through the gears. You will definately like those heads for the cost.

my twisted wedge sbc heads have part number 31500005 stamped on them are thet g1 or g2?

You have G2. G1's will have the following stamped on them:

SN 7674
SN 7666

Again...this comes from the following e-mail correspondance:

Those are the G1 twisted wedge heads. They have a 180cc intake port & a 64cc chamber.

Thanks,
Artie Kakiou TFS Tech Advisor
Email: akakiou@trickflow.com
Tele: 330-630-1555 ext:6324

On Thursday, July 24, 2003 6:06 PM, reply@trickflow.com [SMTP:reply@trickflow.com] wrote:
Trick Flow,
I have the opportunity to purchase a set of Twisted Wedge heads
for a small block Chevrolet. Could you please tell me if the SN's identify
these heads as G1 or G2? What is the intake volume on these heads?
Chamber size?
Your help would be very much appreciated.

SN 7674
SN 7666

Thank You,
Bill

wesilva thanks for clearing things up so i have a g2 set of heads just another question and forgive me for asking again so i can go as big as cam as i want with those heads providing a have the right valve springs or do i have to have special pistons for a bigger cam lift?at the moment i have 490 lift because the dude that sold me those heads said i needed to stay under 500 lift or buy the special trickflow pistons

I have the G1s also and they were rated @ .520 lift out of the box with the standard springs, the optional spring took it to something like .600. I bought them new and kept them in the box until 2 years ago when I put the motor in. I also done some port work on them, they run well and have not had any issues with them. Did have to modify the valve covers and run the thicker rubber gasket to add a little more room. TF recomended using a 1/16 longer pushrod (i think) and I used the Crain gold 1.5 non self align. My pistons were dished some so that was not an issue for me.
as for a cam if still close to stock something close to the tpis zz-9 cam will drive very well ( .489 / .520 112 ) it's on their web page and several other companys offer cams that are very close to these specs.

One other extremely important issue that needs to be expressed...and Artie from TrickFlow puts it best (from an earlier post):

So long as you use the recommended rocker arms & verify the valvetrain geometry as outlined in the instructions, You will not have any premature wear issues.

Here is a list of the recommended rocker arms:

Competition Cams "Pro Magnum"
Crane Cams "Gold"
Summit "Extruded Rockers"
GM stock stamped steel (For camshafts UNDER .450" lift...)
TFS

Here is the list of rockers we do not recommend:

Competition Cams "Magnum Roller Tip"
Crane Cams "Silver" (Energizer)
Harland Sharp
Proform
CAT

The reason why there are some rockers that are recommended and some that are not is rather simple. Alot of the aftermarket rocker arms do not maintain the factory GM (Or Ford, Or Mopar, Or whatever...) center to center distances from the rocker stud to the valve tip.
As an example, Look at the Crane Energizer # 11746-16 in the Crane Cams catalog. You will notice that they have that part number listed as working on an AMC, SBC, "Magnum" Mopar & SBF engine families. How can one rocker arm fit several different engine families correctly? Simple, It cannot.....
You need to invest in a high quality rocker arm & set it up with an adjustable checking pushrod on your particular combination in order to see how all of the tolerances stack up in the as used condition.

You would not believe the amount of people who were using .470"-.510" lift cams with a stock GM rocker arm. For those of you who did not know, A stock GM rocker will only support up to about .450" lift before it binds up on the rocker arm stud. Can you guess what happens when a rocker arm binds on the stud? (It will sideload the valveguide & wipe it out, In a hurry...)

Do not misinterpret what I am typing, On an inline valve arrangement (Including our 23* head...) you can use pretty much any rocker you want, & so long as you get the geometry close it will be fine, But on a rotated valve cylinder head you need to follow the recommendations / installation instructions...

Thank for all the info. I will becarefull to check the valvetrain geometry. cant wait to install them.

Just to fix an error the G2 heads had 190cc ports, 67cc chamber.

I have a set of G1s on my 355 with a CompCam XR270HR retro-roller setup and it puts out 310 RWHP (about 365HP flywheel) which is way more than CompCams dyno sheet they have on their website using Dart S/R heads.

But, my valve guides are currently shot using 1 quart of oil every 500 miles. I will be redoing the heads this winter.

SteelTown,
Are you using the recommended rocker arms? If you do, I feel confident your troubles will be over.

I'm using plain jane Crane aluminums. I'll probably be switching to Comp Pro Magnums after I redo to guides.

I trashed mine with the Comp Cams Magnum roller tips. Specifically listed as one of the rockers notto use. I have a set of Crane Gold Rockers now and looking forward to seeing how they work.

i have a edelbrok performer intake and edelbrok 600 cfm carb. if i get the twisted wedge heads will I need to get new intake a carb?

The heads will work with that intake and carb.

BTW, when I got my G1s freshened up, I got them to flow test it to see the flow numbers. Here is the info sheet they gave me;



Trick Flow claimed 240/190 intake/exhaust at 0.50" lift so they weren't too far off.

Seeing that, unless you get the heads ported, anything more than a 0.500" lift cam is a waste of money as the stock heads do not flow much more after that.

He said that these head could easily be ported to flow 260 cfm without touching the exhuast side would still be a good exhaust/intake flow ratio.

I know this is an older thread, but here is the sheet given to me with the engine I recently bought.. The heads are G1 with porting... Look good?

Jason

no!!!!!!!!!!!!!!!!!!!! not the twisted wedge on a chevy..a ford yes.......but not on a chevy!!!!!!!!!!! theres a reason they dont make the twisted wedge head for the chevy anymore!!!!!!!!!!

good flow #s at high lift but wil lyou run 600+ lift in a small block?if not those flow #s mean nothing.you need to know what youre entire set up will be then try to match the parts.in this case get the heads to flow more at the lift range your enigne will see the most...also you got bg old intake runners on these heads? were they ported? i think stock 190 maybe 200 cc.if they were ported are the 210?220?..if so what kind of manifold you got? putting 210 cc runners on a intake that flows 180ccs is like wiping your *** then pooping....

Those #'s are strong. I have them, I think they are a good head. My car would MPH 120 and change on pump gas and weighed 3450lbs.

AAAAHHHHH! Installed my heads and valve hit my piston, cam only has .505, luckily I turned it by hand. now gotta see what I did wrong.

Engine is a 383, Brodix HV 1000 manifold, Comp 294 cam, etc.... There are 2.05 intake valves in them, Comp Pro Magnum 1.5 rockers, blah, blah, blah. A set of Ross pistons were made for this engine (because of the G1 heads), 11.2 CR , I need to get more build specs, this is about all I remember off the top of my head.

Jason

sounds like a decent match for the flow #s...hope it works out.those heads always had issue witht the new valve train geometry that the twisted wedge design posed. fords like em chevy hates em. i guess theres always exceptions but like i stated previously theres a reason trick flow stopped making them for chevys.......

You need twisted wedge pistons with the right valve reliefs to go with those twisted wedge heads.

when i was running trick flow twisted wedge chevy heads they where $750, when they first came out was put on 355 smallblock chevy with speedpro 2256 pistons comp cam 220/230 dur and lift was 510/510 114 lob sep it ran with no problems.

I know im diggin up an old post, but what intake are you guys runnin with these?

I'm using a McFarland short ram and I have to say, coupled w/ a zz409 cam and a little work on the G1s the engine runs mighty fine, and that's with the supercharger blowing into the air (not hooked up yet)

I put the Eld tpi base and slp runners on mine, ported it all and been running fine.

I have some very old Trick Flows twisted head in fact you can't even order them anymore. On those you can use the factory rocker. The only problem that I came across is when I went to roller rockers I could no longer use center bolt valve covers. I had to weld on some tabs machine them flat tap holes and now I can use the older style valve covers that clear the roller rockers. IF you are ordering these heads new thats all moot but if your getting used ones I hope this helps