Top End Kit

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May 20, 2021 | 10:18 AM

watwikk

Thread Starter

Intermediate

Joined: Jul 2020

Posts: 26

Likes: 5

Top End Kit

Was looking to start adding power to my stock C5 Convertible. I was looking at this kit: https://www.summitracing.com/parts/tfs-k306-515-460

Has anyone used this kit before? What additional parts should I look into getting along with this kit?
Thanks!

May 20, 2021 | 10:52 AM

1wholikescars

Racer

Joined: Apr 2021

Posts: 289

Likes: 102

From: Texas

I like the cam on that, it's a nice not-too-aggressive setup: 228/230 duration, .585 in./.585 in. lift, 112 lobe separation angle . Depending on your year, you might need difference valve covers (if 98 or 99). I'd consider headers as well, if you do, also consider ARP locking nuts so they don't come loose. I'd also grab some heat shielding wrap and/or heat socks and such to protect the spark plug wires (since you probably want some new ones with it anyway), and any other areas you might want to protect.

Also, obviously, get anti-seize, copper gasket sealant RTV, things like that along with your change of oil.

Can't wait to hear what it sounds like. Should have a bit of a growl, but not be obnoxious.

May 20, 2021 | 12:13 PM

watwikk

Thread Starter

Intermediate

Joined: Jul 2020

Posts: 26

Likes: 5

I have some long tube headers and my vehicle is a 2000. Should I look into upgrading the intake manifold and lifters? It doesn't seem like they are sold in this kit.

May 22, 2021 | 05:27 PM

redzg

Safety Car

Joined: Mar 2017

Posts: 3,759

Likes: 935

From: Orlando Florida

Isn't this the point when somebody points out that a supercharger can get the performance for a lot less work -- and at $3.5K, maybe even a little less money?

May 23, 2021 | 01:26 AM

StingrayRebel

Acct Suspended APR 2026 by request

Joined: Dec 2010

Posts: 10,367

Likes: 1,272

2020 Corvette of the Year Finalist (performance mods)

C5 of Year Winner (performance mods) 2019

Quote:

Originally Posted by redzg

Isn't this the point when somebody points out that a supercharger can get the performance for a lot less work -- and at $3.5K, maybe even a little less money?

BUT, if you do a cam/headers setup with a good fuel system with a supercharger that's the difference between 7-800rwhp vs 450-500 on a stock setup

May 23, 2021 | 09:01 PM

PerryKing

Racer

Joined: Aug 2020

Posts: 485

Likes: 370

From: Basehor, KS

2022 C5 of the Year Finalist - Modified

2021 C5 of the Year Finalist - Modified

2020 C6 of the Year Finalist - Modified

Quote:

Originally Posted by watwikk

Im running the TFS GENX heads but with a 228R cam from Texas Speed. I’m also running the Harland Sharp rollers. At the same time I did....LS7 lifters, LS2 timing chain, Moroso high volume oil pump, ATI super damper, new water pump and all the tensioners/pulleys. I used all ARP fasteners going back together. Pretty much a new mid section. I figured while it was apart I’d freshen everything up for the HP increase. I’m putting 469 down at the rear tires.

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