Ivan, So you don't want to mess with the electric vacuum pump eh?:grin::grin: Plus pistons, cam core & grinding......CHA CHING:laugh::laugh::dollar: but you'll have some very nice stuff!:TU:
If it were mine...I'd probably do it...but since it's my sons car, and he is just learning, I'd rather have the car be more bullet proof, reliable, and safe. Like you mentioned earlier....Do it once, do it right.
Placed an order with Tim @ TA Performance today after talking to Marty, and Sean yesterday. Good thing, as I would have made a big mistake on the cam choice...(Thanks Marty for clarifying the cam specs.) And thanks to Sean for helping us choose the cam, and order the Pistons!:grin: Ordered the following today: -Roller cam, and lifters: TA 290/298, .584"/584" with 1.6 ratio , 110* lsa, duration: 227*int/235*exh @ 0.050" -Roller timing set -Roller 1.6:1 rockers -Rocker clamp stud kit. -Springs, retainers, keepers Sent Scotty Brown an email to order up a set of flat top pistons with valve reliefs. .....now we wait.
Why would you want to order flat tops? IIRC that would put your static compression ratio around 12:1 or so with a zero deck height, is this a race gas trailer car or are the plans to use E-85? The cam choice won't help bleed compression down at all, but would work great with around 9 to 9.5:1 or maybe just a touch more? Would need to calculate the dynamic compression and know what grade of fuel you want to run if this will be a street driven pump gas car. If not and you have your heart set on the flat tops then you'll need to run race gas or E-85 as mentioned to stay out of detonation. Derek
I would put in the stout cam and work the brakes to work better. Your going to have to learn how to stop all that power anyways Why do all that stroking and Nascar rods and not put in a stout cam to go with it. Do all that work I would have that comp at 10.
After exchanging emails with Mart, and Sean, I went with Sean's advice on the pistons. The heads have never been touched before, and will only get a minimal amount removed when resurfaced.
I crunched some numbers and it looks like about a 15 cc dish is needed for 10.3:1 with zero deck and 40 thou gasket with 58 cc head
93 is max you can get at the pump. Lots of guys have drums of C 114, C 116, etc that they mix to run their cars on the street. Dont wanna have to go that far...
Thanks for your help Sean.:grin: Haydn can't wait to start building the engine. TA said about 3 weeks for the cam... Still no reply from Scotty. (But like you said, he's most likely VERY busy.)
I guess the CC of the valve reliefs partly depends on the shape of the piston.. A flat top would have deeper reliefs and a dished piston would have less material removed. Here are a set of my pistons that are 15 cc dish from Diamond:
Got an email from Scott this morning. He is looking into different wrist pins and rings for these, as they are not as common as most.
Pistons are bought and paid for, just waiting for them to be made, and shipped. TA Performance charged my credit card for a portion of the parts we ordered, but nothing shipped yet. (No notification of any kind, I just checked my cc for new charges and saw the transaction.) The roller cam was a 3 week lead time, so I may have to call tomorrow for a more accurate update on what's going on, and maybe ask that everything else be shipped, so we can at least get the heads together. (Waiting on springs, retainers, and keepers.)
Called Tim at TA Performance today and asked about the cam. He said it would be another week yet. So I ordered a full gasket set, intake gaskets, oil pump shim kit, booster plate, and adjustable oil pressure regulator. He will send this stuff along with the cam. Not gonna bug Scott Brown yet, as he only put the order in on February 7th, and said it's about a 4 week lead time on them, so...back to waiting. Hopefully get everything here in a couple weeks, and take the Pistons in to have everything balanced. .....I don't remember seeing any weights on the flywheel but do remember a bunch of big holes in it...not much strength there...
