few more questions

95cobra · 09-25-2008, 09:14 AM

i started my tear down on my cobra last night and got a real suprise. let me start off by saying when i bought this car the guy told me the motor had recently been rebuild because of two bent rods due to a big water puddle. So after i bought the car i noticed that i was having to add oil and there was no leaks. Was hoping it was the heads that might not of been worked. Now back to my findings pulled heads off and #1 and #8 cylinders are distroyed. both have small cracks in the wall and #8 looks like someone took a ice cream scoop and dipped a nice big chunk of cylinder wall for a snack. Called the guy i bought the car from (a really good friend) he said his insurance company made him take the car to there mechanic shop to fix it. i guess the guy replaced the rods and put the motor back together and did nothing else. i cant believe the cylinder wall on #8 didnt completely come apart.

So now to my questions im having to build my bottom end sooner than planned.
need help with parts.it is going to be boosted p1sc procharger.
going with a 306. what comp ratio do i need.
heads are Trick Flow® Twisted Wedge® Street Cylinder Heads 61cc.
is there a good crank,rod,piston kit made.
what is a good cam that has a rough idle(i want it to sound good) but is made for boost.
wanting to buy parts tomorrow.

or does anyone have a short block for sale.

coupe · 09-25-2008, 09:56 AM

I would go with a basic eagle, scat or probe kit...but since you're looking for a block anyway, it would probably be a good idea to just go for a shortblock. CHP is good. BB&T is good too. I would use either one of them and make sure the pistons are cut for a TW head and pay the extra for the "dished" piston. It will keep your compression down in the 8.5:1 area. A flat top would probably still work with the 306, but you would need to pay closer attention to the timing and tune especially with the procharger.

For a cam, it's hard to beat the Trick Flow stage 1 cam on a 306. It is inexpensive and will love that Procharger too. The short block might come with this cam as an option, or just buy it at Skummit.

QWKSNKE · 09-25-2008, 10:01 AM

AFM blower cams work nicely too. a lot of their cams are designed for the trickflow heads. If you decide to use one of their cams call them and see what they recommend

BAD INT · 09-25-2008, 10:21 AM

how much power are you wanting and are you wanting your shortblock to be a stock block based or dart block based?

95cobra · 09-25-2008, 01:57 PM

Quote:

Originally Posted by coupe

I would go with a basic eagle, scat or probe kit...but since you're looking for a block anyway, it would probably be a good idea to just go for a shortblock. CHP is good. BB&T is good too. I would use either one of them and make sure the pistons are cut for a TW head and pay the extra for the "dished" piston. It will keep your compression down in the 8.5:1 area. A flat top would probably still work with the 306, but you would need to pay closer attention to the timing and tune especially with the procharger.

For a cam, it's hard to beat the Trick Flow stage 1 cam on a 306. It is inexpensive and will love that Procharger too. The short block might come with this cam as an option, or just buy it at Skummit.

thanks for the info.

95cobra · 09-25-2008, 01:58 PM

Quote:

Originally Posted by BAD INT

how much power are you wanting and are you wanting your shortblock to be a stock block based or dart block based?

i dont guess it matters to much i just need to get something together b4 track day. i figured id have problems but wasnt expecting this.

was looking for about 500hp plus

coupe · 09-25-2008, 03:45 PM

Before track day! yikes. Get a short block.

Here's the Forged shortblock:

http://www.coasthigh.com/product-p/10684-ps-f306-sb.htm

This one's a little cheaper (cast crank), but still a nice setup:

http://www.coasthigh.com/product-p/p2305f-gt-f306-sb.htm

95cobra · 09-26-2008, 07:12 PM

have you heard any bad things about DSS. ive had two people tell me CHP motors arent all that great?

QWKSNKE · 09-26-2008, 07:18 PM

Quote:

Originally Posted by 95cobra

have you heard any bad things about DSS. ive had two people tell me CHP motors arent all that great?

you will hear bad things about any company out there.

FYI. 03slobra has a DSS 331 in his orange/black coupe that has seen a LOT of nitrous track time and has not had any problems with it

SlowJoe · 09-26-2008, 07:19 PM

Quote:

Originally Posted by 95cobra

have you heard any bad things about DSS. ive had two people tell me CHP motors arent all that great?

i have heard good and bad. i think if u stay in the power range of 500-550 they will be ok.

09-25-2008, 09:56 AM	#2
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	I would go with a basic eagle, scat or probe kit...but since you're looking for a block anyway, it would probably be a good idea to just go for a shortblock. CHP is good. BB&T is good too. I would use either one of them and make sure the pistons are cut for a TW head and pay the extra for the "dished" piston. It will keep your compression down in the 8.5:1 area. A flat top would probably still work with the 306, but you would need to pay closer attention to the timing and tune especially with the procharger. For a cam, it's hard to beat the Trick Flow stage 1 cam on a 306. It is inexpensive and will love that Procharger too. The short block might come with this cam as an option, or just buy it at Skummit. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

09-25-2008, 10:01 AM	#3
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	AFM blower cams work nicely too. a lot of their cams are designed for the trickflow heads. If you decide to use one of their cams call them and see what they recommend __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

09-25-2008, 03:45 PM	#7
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Before track day! yikes. Get a short block. Here's the Forged shortblock: http://www.coasthigh.com/product-p/10684-ps-f306-sb.htm This one's a little cheaper (cast crank), but still a nice setup: http://www.coasthigh.com/product-p/p2305f-gt-f306-sb.htm __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

09-25-2008, 09:14 AM	#1
95cobra Senior Member Join Date: Jul 2008 Location: pinson,al Posts: 300	few more questions i started my tear down on my cobra last night and got a real suprise. let me start off by saying when i bought this car the guy told me the motor had recently been rebuild because of two bent rods due to a big water puddle. So after i bought the car i noticed that i was having to add oil and there was no leaks. Was hoping it was the heads that might not of been worked. Now back to my findings pulled heads off and #1 and #8 cylinders are distroyed. both have small cracks in the wall and #8 looks like someone took a ice cream scoop and dipped a nice big chunk of cylinder wall for a snack. Called the guy i bought the car from (a really good friend) he said his insurance company made him take the car to there mechanic shop to fix it. i guess the guy replaced the rods and put the motor back together and did nothing else. i cant believe the cylinder wall on #8 didnt completely come apart. So now to my questions im having to build my bottom end sooner than planned. need help with parts.it is going to be boosted p1sc procharger. going with a 306. what comp ratio do i need. heads are Trick Flow® Twisted Wedge® Street Cylinder Heads 61cc. is there a good crank,rod,piston kit made. what is a good cam that has a rough idle(i want it to sound good) but is made for boost. wanting to buy parts tomorrow. or does anyone have a short block for sale. __________________ http://i330.photobucket.com/albums/l...t/PIC-0020.jpg 1995 cobra #169 of 499 with removeable hardtop and #604 of 1003 of convertibles made. aluminium headed DSS forged 306 p1sc procharged extra goodies still stock ofcourse Last edited by 95cobra; 09-25-2008 at 09:22 AM.

09-25-2008, 10:21 AM	#4
BAD INT Senior Member Join Date: Oct 2007 Posts: 184	how much power are you wanting and are you wanting your shortblock to be a stock block based or dart block based?

09-26-2008, 07:12 PM	#8
95cobra Senior Member Join Date: Jul 2008 Location: pinson,al Posts: 300	have you heard any bad things about DSS. ive had two people tell me CHP motors arent all that great? __________________ http://i330.photobucket.com/albums/l...t/PIC-0020.jpg 1995 cobra #169 of 499 with removeable hardtop and #604 of 1003 of convertibles made. aluminium headed DSS forged 306 p1sc procharged extra goodies still stock ofcourse