[ksilver]

I need some opinions on the suitability of these cams with the twisted wedge heads.

I have been looking at the new trick flow top end kits for a spring project but may have the possibility of picking up a set of comp cam 270's fairly cheap. I'm in the UK so this could save me close to $1,000 by the time you include shipping and import duties, but I need to know how well they work with these heads.

My car is a daily driver and cover 25-30,000 miles a year and the car is never raced. I won't be doing a power adder, it will always be n/a. I am currently at 120,000 miles so will do the bottom end (probably a stroker) either at the same time or may put off until next year to spread the cost.

I want to go high c/r (we have slightly higher octane fuel here than in US, I use an octane rating equivalent to about 96 in US) any thoughts how high would be suitable for a dd?

I am concerned that these cams will lose too much bottom end compared to the cams in the tfs kit?

I've been googling for the last few hours and there are a lot of conflicting comments out there and my head is spinning!

Thanks

[skidad62]

I run Comp Cam XE274H and did not see any lower end torque losses. I would think they would match up to the TFS heads really well. I had to notch my pistons with the 274s - not sure about the 270s

03 Mustang Comp Cams XE274H - YouTube

03 Mustang Comp Cams XE274H - YouTube

[86er]

if you are dropping the coin for those heads and set of cams, spend a smidge more and get a custom cut cam.

Off the shelf cams, work ok with these heads, but they arent like the regular 2v head and need a different cam cut for them to really shine

[jkolbfleisch]

I went with some Custom Grind COMP Cams close to the size of the Stage 3 on my Trick Flow Heads. I lost quite a bit of torque below 3,000 RPM but made up for it up top.

You won't need to notch your pistons with the Trick Flow Heads. I don't need any notches with .545" lift and 277/285 Duration.

[ksilver]

Thanks for the replies, I think these heads are still fairly thin on the ground, either that or everyone who has them are too busy driving their cars to tell us about them on forums

I think I would be fairly happy with the stage 1's that come in the tfs kit but the possibility of the 270's has left me scratching my head a bit, will they be better or worse? As already said I'm not sure if an off the shelf cam designed for a different head is the way to go?

[number1gt]

Im sure the 270s will give you better results then the stages ones

Skiddad62 what exhasut do you have

[99GT35thLE]

I did a lot of research before buying the TF heads and I talked to the TF tech guys.They recommend using a cam that has been ground spcifically for the TF heads.

Go to Modular Head Shop (MHS) and they have the Bullet cams that are TF specific, that's who I ordered my cams from.

You have to remember the TF heads are not at all like the stock heads, the intake valve has been moved and the bowl area is totally different. Sure the Comp cams will work, but just remember they were made for the stock heads.

[skidad62]

Originally Posted by number1gt Im sure the 270s will give you better results then the stages ones Skiddad62 what exhasut do you have

In the vid clip it was stock manifolds, Bassani offroad X, Magnaflow 2.5" s/s piping and tips with 2010 GT 500 mufflers (was pretty easy to fab them up). Zero drone - shockingly loud compared to when they are on the Shelby.

Much louder in person than the vid clip captures. Have since swapped in MAC LTs and a Prochamber - very pleased.

[y2k02]

You should be looking into ported pi heads seeing the car is never raced. The tf heads want higher rpms and dont really make more hp over the pi's till higher rpm.

[ksilver]

Originally Posted by y2k02 You should be looking into ported pi heads seeing the car is never raced. The tf heads want higher rpms and dont really make more hp over the pi's till higher rpm.

I have thought of that, but I'm not sure if there's anyone within 500 miles can do a decent job of it. Certainly ported PI heads and the 270's might be a possibilty.

[y2k02]

You can buy a pair ported from many different places. It would be no different than buying tf heads.

[jkolbfleisch]

Originally Posted by y2k02 You can buy a pair ported from many different places. It would be no different than buying tf heads.

For most setups true. But Trick Flow heads are a completely different design ... not just modified PI Heads. This means you can run huge cams without notching pistons or running into cylinder wall clearence issues. The combustion chamber design also allows significantly more timing to be used before detonation.

[ksilver]

Originally Posted by ksilver I want to go high c/r (we have slightly higher octane fuel here than in US, I use an octane rating equivalent to about 96 in US) any thoughts how high would be suitable for a dd? Thanks

Any thoughts on the Compression ratio, I'm not sure how high to take it and can't find any good info.

I see some setups at about 12.0, how reliable/powerful will the motor be that high?

What characteristics can I expect of a high compression motor?

[NickPohlAandP]

I don't know if I'd go 12:1 on a street car, just in case you ever run into a situation where you can't get your higher octane fuel. However, a higher compression engine will have a bit more power and would looooove some nitrous.

On a sidenote, what in the hell are you doing driving a 'stang in Aberdeen? Isn't fuel around $500 a gallon now? Last time I was there I rented a Pugeot 609 turbo diesel and had a blast with it gettng 50 miles to the gallon. I miss Scotland.

[Mustang46]

Originally Posted by skidad62 I run Comp Cam XE274H and did not see any lower end torque losses. I would think they would match up to the TFS heads really well. I had to notch my pistons with the 274s - not sure about the 270s 03 Mustang Comp Cams XE274H - YouTube

I don't know who build this shortblock, but they installed the piston upside down

your valve reliefs are not correct

[ksilver]

Originally Posted by NickPohlAandP I don't know if I'd go 12:1 on a street car, just in case you ever run into a situation where you can't get your higher octane fuel. However, a higher compression engine will have a bit more power and would looooove some nitrous. On a sidenote, what in the hell are you doing driving a 'stang in Aberdeen? Isn't fuel around $500 a gallon now? Last time I was there I rented a Pugeot 609 turbo diesel and had a blast with it gettng 50 miles to the gallon. I miss Scotland.

Hi mate don't know if you'll miss Scotland too much just now, it's pretty cold.

Yep fuel is pretty expensive about £1.40 a litre which equates to around around $8 per US gallon (Hope I've worked that out right). But work pays it so that's OK!

I don't actually drive a Mustang it's a MG ZT which has the '04 V8 lifted straight from the mustang. The ZT is also badged as a Rover 75 and was the only car that was designed and signed off by BMW during their ownership of MG Rover while they owned it, so as a car think of it as a European Saloon (Sedan) but with a bit of muscle car thrown in. It's not as refined as German V8's - Lots more sound track.

There is one V8 engined ZT in the US, it is believed to have been sent to Rousch as a test car as they did the mapping for it. It has been for sale recently.

Bit of a sound clip As you'll hear sounds a bit more USA than EU

[86er]

its ugly yet its not, id rock it

[ksilver]

Originally Posted by 86er its ugly yet its not, id rock it

I resemble that remark

[NickPohlAandP]

I'm going to go ahead and say it because nobody else has (that I saw), why not get the Trick Flow cams to match the Trick Flow heads? That's what I did. Seems to me the manufacturer of the heads would have a pretty damn good idea on what specs work best.

[ksilver]

Originally Posted by NickPohlAandP I'm going to go ahead and say it because nobody else has (that I saw), why not get the Trick Flow cams to match the Trick Flow heads? That's what I did. Seems to me the manufacturer of the heads would have a pretty damn good idea on what specs work best.

That's where I'm leaning, thanks.