Ktec valves

[smokeybone]

Has anyone had any experience with these valves, was going to buy a new set of genuine Renault ones for my high comp motor I'm building but keep seeing more and more posts about people's cars dropping valves and really don't fancy that happening to mine

 

[BIGASH]

As far as i’m aware and been told K-tec valves are Supertech’s and you can get a full set of Supertech valves for £12.78 per valve from the Supertech UK distributor so a total of £204ish. Less than half the price of K-tec nice margin for them though lol

 

[smokeybone]

That is a healthy profit, can anyone else confirm if this is true if so will get a set ordered from them.

 

[Dan519]

As far as i’m aware and been told K-tec valves are Supertech’s and you can get a full set of Supertech valves for £12.78 per valve from the Supertech UK distributor so a total of £204ish. Less than half the price of K-tec nice margin for them though lol

good luck with that

 

[smokeybone]

Why do you say that?

 

[BIGASH]

good luck with that

When I spoke to Steve at Supertech UK the other day this is what he told me

 

[Dan519]

that's less than a standard valve at trade price

 

[Nick172Cup]

Quite cheap that James! May well look into getting a set to hide away at the price.

 

[BIGASH]

Feel free to call them on 01276 858073 should be in stock this week as they had sold out the other week and were on back order from the US and when I spoke to Supertech in the US to try get some they were in manufacture

 

[Fred@BTM]

you can import them from the US for less than $400 (cira £260)

 

[Dan519]

you can import them from the US for less than $400 (cira £260)

plus shipping, plus import duty.....etc.

 

[DannyR]

Nope, that's including. Enquired before about it and after import tax etc it wasn't far off of that.

 

[BIGASH]

Works out at £10 something per valve from the US with the discount they offered me + the import and delivery so yeah about 260ish. Cheaper to just buy from the UK and get them next day I got told to jog on when I asked for them even cheaper but he did offer free delivery

 

[SharkyUK]

Just to confirm, Steve (as mentioned by James) DOES sell these for £12.78 per valve. I've just spoken to him again having placed an order for a set or two. Due to recent demand he's having to order more in and should be receiving additional sets in the next fortnight.

 

[BIGASH]

Just to confirm, Steve (as mentioned by James) DOES sell these for £12.78 per valve. I've just spoken to him again having placed an order for a set or two. Due to recent demand he's having to order more in and should be receiving additional sets in the next fortnight.

Thanks for confirming Andy I was going to call them again to make sure I hadn’t got confused with all the doubt but you’ve saved me a job Glad you managed to get some and look forward to seeing the engine come together!

 

[Chip-mk1]

The price is normally different between the inlet and exhaust as the inlet are just 214n where as the exhaust a 2 piece inconel valve, so was that the average price per valve or is the UK distributor selling them all at one price for some reason (even though the US always quotes them differently IME)

Including import duty and shipping (supertech use fedex who are epic for delivery times but quite dear) etc it cost me about 300 quid ish when I a set for my girlfriends 172.

If a few of you buy together though of course, the 100 dollars shipping can be split between you and bring the cost down, im sure Fred's quote of 260 is achievable relatively easily.

You would need to have been dropped on your head to want to pay 500 quid for a set of valves of that construction TBH, they just arent worth anything like that much.

 

[SharkyUK]

Chip/Dan... are there any particular set(s) of uprated valve springs you would recommend to use with the SuperTech valves?

 

[Silent_Scone]

Planning on running some mega cams dude?

Is there a group buy going on at this moment in time for the valves?

 

[Chip-mk1]

Chip/Dan... are there any particular set(s) of uprated valve springs you would recommend to use with the SuperTech valves?

Engine dynamics do some cheap and cheerful ones that work quite well at moderate RPM (ie upto what standard lifters can take anyway)
Im sure Iskey or similar would be happy to supply some if you have them the relevant details, but its not something I have needed to do personally on an F4R as Ive never gone much over 8Krpm

 

[SharkyUK]

Planning on running some mega cams dude?

I'm currently buying parts for my forged engine build, mate. I have a lovely set of Shricks waiting to go in.

Engine dynamics do some cheap and cheerful ones that work quite well at moderate RPM (ie upto what standard lifters can take anyway)
Im sure Iskey or similar would be happy to supply some if you have them the relevant details, but its not something I have needed to do personally on an F4R as Ive never gone much over 8Krpm

Thanks mate.

 

[Chip-mk1]

What CR are you going for?

 

[SharkyUK]

What CR are you going for?

I'm looking at going for a 12.6:1 CR (with the standard 82.7mm bore) with Wossner's. As I'm not planning on running stupidly high RPM, and I don't want to inflate the cost of the build, I'm assuming I won't need solid lifters, etc.

 

[Fred@BTM]

go 83mm mate

 

[SharkyUK]

go 83mm mate

Excuse my lack of knowledge in this area... but if I went for 83mm bore size how would this build be different compared to staying at the standard 82.7mm? I'll likely be coming to you to get this done anyways... LOL!

 

[Chip-mk1]

I'm looking at going for a 12.6:1 CR (with the standard 82.7mm bore) with Wossner's. As I'm not planning on running stupidly high RPM, and I don't want to inflate the cost of the build, I'm assuming I won't need solid lifters, etc.

You are buying forged internals but re-using the 100K mile old bores?

Seems like false economy to me, if you want to get the piston to bore clearance just right (and hence the engine last longer) then go for 83mm ones instead.

12.6 is as much as I would go for on a road car, the gains going anymore than that are really going to be small on normal fuel, in fact personally I like 11.8:1 pistons as by the time you have built it with a bit of a skim on the head and block to clean it all up you end up around 12:1 anyway.

 

[SharkyUK]

You are buying forged internals but re-using the 100K mile old bores?

Seems like false economy to me, if you want to get the piston to bore clearance just right (and hence the engine last longer) then go for 83mm ones instead.

12.6 is as much as I would go for on a road car, the gains going anymore than that are really going to be small on normal fuel, in fact personally I like 11.8:1 pistons as by the time you have built it with a bit of a skim on the head and block to clean it all up you end up around 12:1 anyway.

No, no mate - sorry for not explaining myself clearly. I'll be getting new bores regardless but I was simply wondering if there's anything I need to be aware of by slightly increasing the bore to the larger size.

 

[Chip-mk1]

No, no mate - sorry for not explaining myself clearly. I'll be getting new bores regardless but I was simply wondering if there's anything I need to be aware of by slightly increasing the bore to the larger size.

You dont "get" new bores.

You use a machine to cut your old bores out to the next size up, as yours (due to wear) are now probably bigger than standard, you cant cut material out to get a new fresh bore thats smaller.

It would be like having a hole and tryin to use a drill to make it smaller again.

 

[Silent_Scone]

You bought the pistons already Andy?

Only reason I ask is if you're going to be spending all that money on the block to make it scream like a banshee I'd be tempted to go FI. That's what I'm contemplating at the moment. I almost spent 3 grand on an N/A engine but scrapped it as the return is just pointless on a road legal car. Don't get me wrong it will be awesome! But you're looking at 230 bhp for something that's going to barely keep up with a stock block with a low pressure setup. It's nuts.

Actually what am I saying it's all nuts, but still

 

[BIGASH]

Haha your all turning to turbo and supercharged pansies :rasp:

 

[SharkyUK]

Yeah - I appreciate that. This isn't going well! LOL! I have factored into the build a second engine (low mileage) which was going to be the basis for the 'new' build. This was going to stay at the stock 82.7mm bore. However, I could stick with the existing engine and get it bored out to 83mm it would seem. I hope that makes sense now - cheers.

 

[SharkyUK]

You dont "get" new bores.

You use a machine to cut your old bores out to the next size up, as yours (due to wear) are now probably bigger than standard, you cant cut material out to get a new fresh bore thats smaller.

It would be like having a hole and tryin to use a drill to make it smaller again.

Yeah - I appreciate that. This isn't going well! LOL! I have factored into the build a second engine (low mileage) which was going to be the basis for the 'new' build. This was going to stay at the stock 82.7mm bore. However, I could stick with the existing engine and get it bored out to 83mm it would seem. I hope that makes sense now - cheers.

 

[Chip-mk1]

Yeah - I appreciate that. This isn't going well! LOL! I have factored into the build a second engine (low mileage) which was going to be the basis for the 'new' build. This was going to stay at the stock 82.7mm bore. However, I could stick with the existing engine and get it bored out to 83mm it would seem. I hope that makes sense now - cheers.

Even a low mileage one by the time its been honed out will end up outside of tolerance generally.

Dont get me wrong, it isnt by much, but why compromise when you can just go 83mm and not have to.

 

[Chip-mk1]

Haha your all turning to turbo and supercharged heros

Im sure you would be too if the rules didnt ban you from doing so!

 

[Silent_Scone]

Haha your all turning to turbo and supercharged pansies :rasp:

LOL. Shhh.

Pretty much though lol

 

[SharkyUK]

^ (Apologies for the double post - hate typing longer messages via smartphone!)

You bought the pistons already Andy?

Only reason I ask is if you're going to be spending all that money on the block to make it scream like a banshee I'd be tempted to go FI. That's what I'm contemplating at the moment. I almost spent 3 grand on an N/A engine but scrapped it as the return is just pointless on a road legal car. Don't get me wrong it will be awesome! But you're looking at 230 bhp for something that's going to barely keep up with a stock block with a low pressure setup. It's nuts.

Actually what am I saying it's all nuts, but still

No mate - the pistons haven't been ordered yet. As for the power gains... yeah, I know they are minimal compared to FI and the cost is disproportionate but I like N/A and I'm not chasing big figures with the Trophy. I'm really desperate to keep the ITB's as well as I love the way it's transformed how it drives. I know I could save a fortune but... maybe I'll go FI once I've pi$$ed my hard-earned away in a few years... LOL! Appreciate the input though and yes, I appreciate where you're coming from.

 

[SharkyUK]

Even a low mileage one by the time its been honed out will end up outside of tolerance generally.

Dont get me wrong, it isnt by much, but why compromise when you can just go 83mm and not have to.

Ah, now that's the answer I'm looking for. If that's the case whereby the tolerance could well be outside anyway then - yeah - totally agree. I'll just look to go 83mm. Thanks for the input mate. It means I don't have the hassle of looking for a decent low-mileage engine too.

 

[Silent_Scone]

Yeah don't worry same boat different mug in this case lol .


If you've not bought the valves yet though dude let me know what you're doing as I may jump in if theres a few of you.

 

[Chip-mk1]

On the N/A versus Turbo thing, its a LOT easier to keep an N/A clio on the track than a turbo one from a reliability point of view, total lack of torque is good for the gearbox etc.

If I only had one trackday car, it would quite possibly be an N/A one TBH, they do drive in a fantastic way too and I just LOVE the sound of a decent N/A engine.

But as I can just jump in the mrs RS2 one whenever I want anyway, it would be pointless me having an ITB one that was just the same basically but maybe 10% more, I'd sooner have the contrast of some proper power instead.

 

[BIGASH]

Im sure you would be too if the rules didnt ban you from doing so!

I don’t think I would but I could be wrong

 

[Chip-mk1]

I don’t think I would but I could be wrong

Depends, do you like finishing last by several laps? Cause that is what would happen if everyone else was allowed unrestricted turbos like we can with trackday cars and you choose not to use one too, lol

Ironically though, because of the suspension differences and weight saving etc, I suspect your asthmatic weazy little underpowered engine'd car will still outpace my turbo anywhere we go together, but that will be despite your N/A engine not because of it, lol